How I Became Big Sister's Sex Slave free porn video

This all started the summer I turned 18. My older sister, Karen, was home from college for the summer. Karen was 20 and had been away at school for awhile, so at first it seemed weird to be living with her again. Karen and I had always gotten along alright, typical brother and sister stuff, but we were totally different types of people. I'm a tall, skinny k**, kinda quiet and shy. I have a few close friends at school, and I've even had a couple of girlfriends, but definitely no major relationships, and I'm certainly far from experienced in the sex department.

Karen, on the other hand, is more or less my exact opposite--outgoing, extremely social and friendly. When she was in high school Karen was a total party machine--Week nights, weekends, whenever. She'd always had tons of different boyfriends and was really popular. In fact, she was such a wild c***d that I think my parents were pretty relieved to send her off to college. Also, although being her brother I'd never really noticed it, everyone at school (at least all the guys) thought Karen was totally hot: shoulder-length natural honey-blonde hair, full, pouty lips, blue eyes, large, firm breasts, a tight curved ass and legs to die for. She tanned year round, either laying out (in the summer) or at a tanning booth (in the winter) so year round she had a perfect complexion.

Yeah, my sister was hot, and she knew it. She got a kick out of teasing all the guys who were constantly checking her out, flirting with them and driving them crazy. Whenever any of my friends from school would come over to the house Karen would really put on a class act, wearing her sluttiest outfits, super short skirts, virtually non-existent tops that showed off her cleavage really well. She would "accidentally" drop something and bend down really slowly right in front of them until her ass was practically totally exposed, or lean down to talk to them and show plenty of cleavage as her top opened. This drove my friends wild, but they did seem to visit a lot.

Anyway, this particular summer when Karen came home she seemed different--still totally hot, with the party girl attitude, but different around me, friendlier somehow. The moment she walked in the door, before she even tried to find mom and dad, she ran over to me and gave me a big hug.

"Hey Brian, long time no see! Did you miss me?"

I was a little taken aback by this but managed to mumble, "Yeah, I guess so." She laughed and then stepped back and said, "Hey check it out, you like it? I just had it done a month ago." Karen pulled up her top a little to expose her stomach and a nice gold bellybutton ring.

"Yeah, it's cool. Mom and dad'll probably freak, though."

Again that low, throaty laugh. "Who says they have to know?" Still laughing, she walked into the kitchen.

Things were pretty normal for the first few weeks of summer. I'd gotten a part time job at a nearby supermarket and Karen was out with friends a lot so we only saw each other in passing. The only thing that took a little getting used to was having to share a bathroom again. Karen wasn't exactly the neatest person and our bathroom was always cluttered with "girl stuff": makeup s**ttered all over, panties, bras, even lingerie. One day I found a bright red thong lying on the floor in front of the clothes hamper. Absent-mindedly I picked the thong up, intending to toss it into the hamper when I noticed a dark spot in the crotch area. I fingered it and it was still slightly damp.

Shit! My sister must have just barely taken these off! Quickly shutting the bathroom door all the way, I raised the thong to my face and sniffed it, inhaling deeply. The rich, musky aroma was unmistakable and my cock stiffened immediately in response to the intoxicating scent. Just then I heard someone coming up the stairs and then Karen saying, "Brian, are you in there? Hurry up, I really gotta pee." I froze, the thong still raised to my face. Damn, what was I thinking, sniffing my own sister's panties and getting turned on by it? What the hell was wrong with me?

After a moment or two I managed to reply, " I'll be out in a second." Blushing, I tossed my sister's thong into the hamper and then flushed the toilet, ran some water and pretended to wash up long enough to allow my hard on to dwindle.

As soon as I opened the door, Karen shot past me into the bathroom. "About time, I really gotta go." As she passed me her hair brushed against my face and I caught just a slight hint of musky perfume. My cock twitched in response and I quickly closed the door and hurried downstairs. As I went, I couldn't help wondering about just how Karen got that damp spot on her thong, and just thinking about it, about her, was getting me aroused. What the hell was going on with me? I never thought of myself as a real pervert (no more so than any other typical teenager with raging hormones anyway) but here I was getting a throbbing hard on at the sight of my sister's panties and the scent of her perfume. I tried to dismiss it as being simple horniness, but still my thoughts lingered on my sister for a long time.

Everything changed when mom and dad went away for their annual week's vacation. Since Karen was the oldest, they informed us, they would be leaving her in charge. Needless to say, Karen enjoyed this immensely, and I had to endure a lot of teasing about her being the boss and comments like, "Ok Brian, you better do what I say, remember who's in charge around here."

Karen also took advantage of this opportunity to turn our house into party central almost as soon as mom and dad's car left the driveway. She partied hard for two days (and nights) in a row, and there was never any shortage of people (mostly guys, I noticed) who were willing to party with her. Each night ended the same way: My sister, drunk off her ass and already half naked, stumbling upstairs to her bedroom with whichever lucky guy she'd chosen to be her boy toy of the evening. I would never admit it to myself fully, but in the back of my mind I couldn't help feeling a twinge of jealousy as I watched her stagger up the stairs d****d all over some anonymous stud.

Whenever I could, I would help Karen clean up the mess the next day, but because of my work schedule Karen had the house to herself a lot, especially during the day. One day, toward the middle of the week I got off work early (it was around two in the afternoon instead of the usual four). When I pulled into the driveway, I noticed that there was another car there besides Karen's, but I didn't think anything of it, figuring it was just one of Karen's friends.

I walked into the house, tossed my keys on the kitchen table, and was just thinking of getting something to eat when I heard a noise from upstairs. Bedsprings were creaking like crazy and I heard Karen moan, "Oh yeah, that's it! right there! oh, fuck!" Shit, Karen was fucking some lucky bastard right now, in the middle of the day. For a moment I stood there, motionless at the foot of the stairs, just listening. then I couldn't resist any longer--I just had to check it out. I kicked off my shoes and crept up the stairs as quietly as I could.

Score! Karen's bedroom door was partway ajar. (She obviously wasn't expecting me home for a couple more hours). Sneaking passed our shared bathroom, I hid myself behind Karen's partly opened bedroom door as best I could and peeked in. I couldn't believe the sight that greeted me: Karen was on her hands and knees in the middle of her bed, completely naked, getting fucked hard by two guys at once! the guys both looked vaguely familiar and I figured I'd probably seen them at one of Karen's parties. The guy in back, the one with dark hair, was pounding away in Karen's pussy furiously, while the guy in front of her, a blonde, was holding the back of Karen's head with both hands and sliding his large cock in and out of her willing mouth, fucking her face. The room was filled with moist slurping sounds as Karen's dripping snatch engulfed the dark haired guy's cock, his balls slapping against her ass cheeks, her big tits quivering and flopping as he fucked her. Karen pulled away from the blonde's big cock long enough to scream out: "Yeah, that's it! Fuck my wet pussy! Oh, God! Shit! Ahh, make me cum!!"

I couldn't believe it. This was so incredibly hot! My cock was so hard that it was practically tenting out my jeans. I was afraid my zipper was gonna explode. The guy behind Karen really picked up the pace then, slamming his cock into her as hard and fast as he could, pulling out the entire length and then driving it into her until his balls slapped against her red ass cheeks, making her scream and moan as she continued to deep throat the blonde in front of her.

"Fuck man, this bitch is awesome," The dark-haired guy grunted as he pummeled my sister's sweet pussy.

"Yeah dude, she's really into it," The blonde replied, face fucking Karen until she gagged and his balls were pressed up against her chin.

Karen moaned deeply, then pulled away from Blondie's big cock and gasped out, "Yeah, it's so fuckin' good! Wait, I want you both to fuck me at the same time. I want a cock in my ass and pussy!"

The guys looked at each other for a second, then the blonde said, "For real? You wanna get double stuffed?"

"Fuck yeah I do!" Karen panted. "Here, lie down on your back."

It was as they switched positions that I made my crucial mistake. I was so caught up in the action going on in front of me that I forgot that I was only partially hidden by the bedroom door. As Karen swung around and impaled her wet pussy on Blondie's hard cock, she was facing directly toward the doorway. For just a moment, our eyes locked. She got this huge grin on her face and, still staring directly at me , she shoved herself down and took Blondie's entire cock deep into herself in one motion. Fuck! I was caught!

I quickly ducked back completely behind the door, but I knew it was far too late for that. As I stood there, torn between shock and incredible feelings of lust, I heard Karen say, "Mmmm, yeah, now shove your big dick up my tight little asshole! Yeah, fuck both my holes!" This pushed me over the edge. I couldn't take anymore, my cock was so hard I was afraid I was gonna cum in my jeans in another second. I rushed to my room, shutting the door behind me as quietly as I could, I ripped off my clothes in a frenzy and, lying down on the bed completely naked jacked my rock hard prick as I continued to listen to my sister getting fucked just down the hall:

"Oh yeah, uhhh, that feels so good, so full! Harder! unnh!"

"Dude, her ass is so fuckin' tight! Feels great!"

Long moments of panting and wet sucking sounds. "Oh, man, I can't last much longer, I'm gonna nut!"

"Me too, shit, it's too fuckin' good. Uuuunh, fuck, I'm gonna cum!!"

"Yeah, fuckin cum inside me! Shoot that shit deep in my ass and pussy! Do it!"

"MMMM, UNNHHH! Yeah, fuck!!"

For a long while everything was quiet except for the sounds of harsh panting and low, ragged breathing. My hand was a blur on my cock by this time, and I felt ready to explode. I froze as I heard the sound of voices in the hallway:

"Shit Karen, that was awesome! Thanks a lot!"

"Yeah, thanks, that totally rocked!"

"Anytime guys. You should come over more often!" The sound of my sister's laughter. "You know we will now for sure! We'll call soon. I wanna get a chance at your sweet ass next time!"

"No problem, whenever you want, Gary." Again, her soft chuckle.

"Well, we gotta take off, practice this afternoon."

"K, see ya later. Call me."

"You know it!"

Then the fading sound of footsteps on the stairs, the slamming of the front door, and they were gone. Man, I just had to bust a nut. I resumed jacking at a frantic pace. Yeah, so close, I know I'm gonna shoot a huge load, almost there. . .

My bedroom door swung open. Karen stood in the doorway, naked, her large nipples rock hard, a slight sheen of perspiration glistening all over her body and a mixture of cum and her own pussy juices running down the inside of her legs. "Jesus, Karen, what the hell are you doing!?!" I grabbed frantically for my blankets and threw them over my lower half. It was a somewhat useless gesture, though, since my cock made a tent out of those blankets in a major way.

She looked at me with an arrogant little smirk on her face. "Did you like it?"

"What?!? Wadda you mean?" This has to be a dream, I thought to myself. This can't really be happening. This hot-ass slut goddess standing in my bedroom doorway, the picture of every teen male's fantasy, and she's my fucking sister!

"Did you like it?"

"Shit Karen, this is too--"

She stepped up beside the bed and with a single motion ripped the blanket away from me, leaving my exposed and rigid manhood sticking straight up. Karen looked at me and chuckled. "Yeah, you liked it. You loved watching your big sister get stuffed full of hard cock. You loved watching me suck dick and get plowed in the ass, didn't you, Brian?" At this point I was in such shock that all I could do was make strangled noises in the back of my throat and gaze at her helplessly. My raging hard on said it all, however.

Karen slowly swung her leg over the side of the bed and squatted directly over my face, her dripping pussy inches from my mouth. "Be a good brother and lick my pussy and ass clean, Brian, suck my cunt and make me cum all over your face. Lick me!" She shoved he pussy against my open mouth, grinding down on me, smearing a mixture of cum and sweet pussy juice all over my face. Part of me knew that this was wrong, that i****t was wrong, but by this point I was so crazed with lust that I would do anything. Reaching up, I grasped Karen's hips and pulled her down even farther until she was almost smothering me with her beautiful pussy. I licked and sucked every inch of her hole, tasting her, exploring the folds of her cunt lips with the tip of my tongue, tongue fucking her, sticking my tongue as deeply inside her as I could, tasting the sweet tang of her own juices mingled with the faintly salty flavor of the spunk that was dripping from her holes.

"Oh yeah, little b*o, just like that, clean my pussy real good. I knew you wanted this." She ground her crotch against my face hard as I continued to lap, sucking all of her juices into my mouth, tasting the core of her as I flicked my tongue against her swollen clit as hard as I could. "Oh shit, oh fuck yeah b*o! That's it, make your big sister cum!!" Karen squealed and smashed her crotch against my face as she came, squirting hot sticky pussy juices all over my face and open mouth.

"Oh yeah, Brian, that was really nice. Clean up my asshole now and you'll get your reward." I obeyed eagerly, tonguing her beautiful tight butthole, lapping all around it, plunging the tip of my tongue deep inside, sucking out all of the jizz that had been shot into her and gulping it down.

"Mmmmm, that feels so good Brian, you nasty little boy, sucking cum out of your big sister's asshole," Karen moaned. "That's it, stick your tongue in real deep, make sure you get it all. " After awhile Karen stood up and smiled at me. "You did a real good job, little b*o. You've earned your reward. Ok, go ahead and spread your legs wide apart." I did so and Karen crawled between my legs. I gasped with pleasure as I felt Karen's warm hand close around my dick and begin slowly pumping up and down. "Mmmmh, doesn't that feel good Brian? You like the feeling of your big sister's hand stroking your hard cock? Do you?"

"Yes, yes!" I stammered.

"Yeah, I thought so. Then you're gonna love this." Karen ran the tip of her tongue all around the head of my cock, licking at the piss slit and tasting the pre-cum that was flowing out of me as she continued to slowly pump up and down with her hand.

I moaned deeply and arched my back. "Ohhh, God, Karen that feels so good!!"

Karen glanced up at me again with that arrogant smirk on her face. "What do you want little brother? Do you want to cum? Do you want to feel my lips around your cock as you shoot your load into my mouth?"

Weakly I gasped out, "Yes."

She smirked at me again, her hand wrapped tightly around my now pulsing dick, her mouth inches from my engorged cockhead. "Beg for it, b*o. I wanna hear you beg your big sister to suck your cock."

I couldn't help myself. "Please Karen, please, I'm begging for it, please suck my dick, make me cum."

She chuckled. "Good boy." I gasped as I felt the warm wetness of her lips engulfing the head of my cock, moving down my shaft, massaging it with her tongue, slowly taking more and more until my cock was buried in the wet heat of her throat and my sister's nose was mashed against my pubes. She slowly and gently squeezed my balls with one hand as she slurped on my cock, deepthroating it and then releasing, sucking only the head, moving down slowly and teasingly. It felt so incredible, and I knew I couldn't last much longer. Looking down at my sister's head bobbing up and down on my hard shaft I felt my ball sac tighten and my toes begin to curl.

"Oh, shit, yeah, oh god, Karen, I'm gonna cum!!!" Karen took my cock deep into her throat, swallowing reflexively as I shot blast after blast of hot cum into her mouth. Finally I lay back, panting for breath, my eyes half closed in delirious oblivion. My sister crawled slowly up my prone body, dragging her hardened nipples against my chest, sliding her beautiful tits against me. Our lips met in a long, delicious kiss, and as Karen's tongue slid into my mouth I tasted the salty bitter flavor of my own cum.

"Did that feel good, Brian?"

"Oh, shit, Karen, that was the best orgasm I've ever had!"

She smiled. "Yeah, well it sure as hell won't be the last one. We've got all summer, and I have definite plans for you, little brother."

I looked up at her with a puzzled expression. "What do you mean?"

She just giggled and waggled her eyebrows at me. "If you're a good boy, maybe you'll find out."

She slid off of me and stood up. "Stay right here, don't move, I'll be back in a second." Watching my sister's perfectly tight, round little ass bounce as she walked out of the room, I felt my cock stir and come to life again, stiffening in appreciation of the sight. I lay there in a daze, unable to believe what had just happened. After a few minutes, Karen came back holding a couple of lengths of kitchen twine in her hand and smiling wickedly.

"Woah, wait a minute, what are gonna do with that?" I asked.

Karen just laughed. "Don't worry Brian, I promise, you'll love this game."

Before I could quite register what was going on, my sister had grasped both my hands and tied them securely to either side of the headboard bedposts. I lay there on my back, hands lashed tightly above my head, helpless and under my sister's complete control. my cock throbbed with eager anticipation even as in another, more rational part of my mind I was a bit scared.

Karen reached down and squeezed my erection lightly. "Hmmm, it looks like you missed me while I was gone." Then she glanced up at me. "You look good this way Brian, bondage agrees with you." She crawled up my body until she straddled my chest, her beautiful, firm breasts swaying inches from my face. "Oooh, Brian, when you ate me out it made me sooo wet, " she whispered in my ear. She wiggled two fingers into her wet pussy and then slowly, seductively swirled her fingertips around her hardened nipples, smearing them with her own juices. "My nipples are so hard, Brian. Do you like my tits? Do you want to suck them?" She continued to knead and caress those firm mounds now only inches from my face, tweaking her nipples, tugging on them.

By this time I was in an absolute frenzy of desire. Karen's dirty talk was driving me crazy ; all I could think about was how much I wanted her body, how much I wanted to give her pleasure, to obey her every whim. "Yes! God yes, I wanna suck your tits so bad, Karen, please!" I panted.

Again that soft, throaty chuckle. "Good boy, you learn fast. Go ahead Brian, suck your big sister's titties, make me feel good." She leaned forward and pressed her tits against my face and slid them back and forth as I sucked first one then the other hard nipple into my mouth, swirling my tongue around it, tasting the musky sweet flavor of her pussy. After a few minutes of this Karen pulled back slightly, positioning herself so that she was straddling my waist, holding her pussy just above my hard and throbbing dick. "What else do you want, little brother? Do you want to fuck me? do you want to feel your sister's hot, wet pussy sliding up and down your shaft, squeezing it, making you cum? Is that what you want?" Karen whispered.

"GOD!! YES, YES!!" Tugging uselessly at my restraints, I bucked with my hips trying desperately to plunge my cock into her hole.

Smiling, Karen slapped me gently across the face. "Who's in control here?" she demanded.

"You are, Karen."

"That's right. You'll do whatever I want, whenever I want, won't you little brother?"

"Yes, yes, I swear Karen, I'll do anything you want, just please fuck me."

She laughed softly. "That's better, Brian. I love to hear you beg, it turns me on. Say, 'Mistress Karen, please fuck me and make me cum.'" I hesitated for a moment, staring up at her. "Beg for what you want little b*o, and I'll give it to you."

I was so turned on by Karen's aggressiveness, her total dominance, that I would have done anything she said. "M-mistress Karen, uh, please fuck me and, uh, and make me cum," I stammered in a low whisper.

"Mmmmm, that's a good little slave." Karen slowly eased herself down onto my cock, sliding down my shaft until I was completely buried in her hot, wet tunnel. The sensation was exquisite and I moaned deep in the back of my throat, trying desperately to keep from cumming right then and there.

Karen whimpered softly and began sliding up and down on my cock , riding me faster and faster until she was slamming up and down, balancing herself with both hands pressed against my chest as she fucked me, her ass grinding down against my balls with every stroke. "Ohhh, Brian, that feels sooo good!!" she panted. "YEAH, FUCK ME!! You're fucking your own sister you nasty little slut! Do you like it? Does it feel good?"

I was totally in bliss, the feeling of my sister's tight slippery twat riding me, devouring my cock, was amazing. "Yeah, God yeah! Oh shit Karen fuck me harder! please!"

Karen was riding me furiously now, impaling herself on my hard shaft as deeply as she could with every stroke, panting, her head thrown back, her huge tits quivering as she fucked me. "Yeah little brother, that's so good, so fuckin' good! Make me cum, uuunhh, yeah, oh god, oh shit, I'M CUMMING!!!" With a scream she thrust down on me completely and I could feel the walls of her pussy contracting as she came, flexing around my cock, milking it.

"Oh Fuck, Karen, I can't hold back, uuuhn, AHHH! I'm gonna cum!"

Karen leapt off of me and, grabbing my still pistoning cock with her hand, she aimed it directly at her chest. "Yeah b*o, shoot that hot load, I wanna watch you shoot your jizz all over my big titties!"

She stroked my cock twice and I was gone. "AAAAHHH!" Cum erupted from my cockhead in three long spurts, coating my sister's tits, dripping from her nipples. I fell back against the bed, hanging limply against my restraints, exhausted, totally spent. Karen rubbed my cum all over her breasts, massaging it into them. Using both hands she then scooped up all of my cum from her chest and lapped it from her fingers, swallowing every drop.

"Mmmm, you taste delicious little brother." She untied my wrists and lay down beside me, snuggling close. Kissing me on the cheek she whispered, "Better rest up Brian, this is just the beginning. Remember, you promised, 'anything I want,' right?"

When I woke up the next morning, the events of yesterday afternoon seemed like a hazy dream. The slight soreness at my wrists, along with the flecks of dried cum stuck to my belly, however, convinced me that it had been all too real. I got out of bed quietly, gathered my clothes, and headed for the shower. Walking by Karen's bedroom, I noticed that her door was partway open, and I could hear her soft breathing as she slept. Flushing with embarrassment , I hurried past and into the bathroom. As I showered I couldn't help but recall what had happened yesterday. Karen had been so aggressive, so dominant . . . and, I admitted to myself, I had loved every second of it. Just the thought of her made my cock stiffen and throb with anticipation. You've gotta snap out of it, I told myself sternly; it was just a one time, freak thing that happened. The best thing to do is to act like it never happened. As I grabbed a quick cup of coffee and headed out the door to work, though, Karen's words echoed in my mind: "We've got all summer, and I have definite plans for you, little brother." And, even more intriguing: "Better rest up Brian, this is just the beginning. Remember, you promised, 'anything I want,' right?"

It was a particularly busy day a work, and by the time I pulled into the driveway that afternoon I had more or less forgotten the whole incident, having made up my mind to simply act as if nothing had happened. I walked in the front door, tossed my keys on the kitchen table and then stopped dead in my tracks. Karen stood in the middle of the living room with that arrogant yet sexy smirk on her face. She wore a jet-black tank top that showed off her toned stomach and bellybutton ring to full advantage; printed across the front of her tank top, in bold, lipstick-red letters was the word "goddess." I could clearly see the outlines of her already hard nipples pushing against the fabric of her top. Her red miniskirt was so small as to be almost non-existent, and it left very little to the imagination. A pair of black leather thigh high boots completed the package. For a moment, I couldn't speak, only stare as I took in this vision of smoldering sensuality that stood before me like a fantasy come true. She really is a goddess, I thought to myself.

Karen simply stood there for a moment, smiling and allowing me to admire her. "You like what you see, little b*o?" she murmured.

"Karen, I, I mean--" I stammered.

"Yeah, you like it, don't you?" Her tone was self-confident and yet seductive, imperious.

I couldn't help myself; "Yes," I whispered.

"Yes, what, Brian? Tell me what you like."

My heart was hammering in my chest; I couldn't seem to think straight. All I could do was gaze in awe at my own sister, a vision of lust personified. Blushing and keeping my eyes fixed on the floor I answered, "You. I like you, Karen. You're gorgeous."

She laughed, a low, throaty chuckle. "There little b*o, now was that so hard? Come here."

I walked over to her, until we stood face to face. With her high heeled boots she stood slightly taller than I. Our lips met, and I felt the hot warmth of her tongue encircling my own, probing my mouth. With one hand she reached down and stroked the front of my jeans, caressing the outline of my erection. "Mmm, maybe it was really hard after all," she whispered. Her face just inches from my own she asked, "Was I good yesterday, Brian? Did you like fucking your slutty older sister? Did you like tasting me, pleasuring me? Did you like it when I tied you up and rode your hard cock until I came?"

"Oh, God yes, Karen! I loved it!" I moaned, desiring her more than ever.

Again that low, throaty chuckle. "Yeah, that's what I thought. I'm going to have so much fun with you, little b*o. Do you remember your promise?"

I knew all too well what she meant. "Y-Yes," I stammered.

"What did you promise? Tell me, Brian," she demanded.

In a low voice I whispered, "I promised to-to do whatever you wanted."

"That's right little b*o, that's exactly what you promised. Get on your knees, I have a surprise for you."

I looked up at her, confused. "Surprise? What do you--"

ON YOUR KNEES! NOW, BITCH!" Her shouted words were accompanied by a light but stinging slap across my face. I immediately sank to my knees and stayed there, immobile, staring at the floor. "Yeah, that's right, good boy," she purred. "You stay right there like that. I'm going to go get your surprise. I know you're gonna love it, little b*o." I heard her walk away toward the stairs. My mind was a whirl of confusion. Part of me couldn't believe that this was actually happening while another, more secret part of me enjoyed it and longed to be completely dominated by my sister. With my eyes still fixed on the floor, I heard the click of Karen's heels announcing her return before I actually saw her. She stopped directly in front of me and I glanced upward. Karen stood in front of me. holding a black leather spiked dog collar in one hand. Smiling, she uttered a single command: "strip."

"What?!? But Karen, I--" Before I could finish my sentence I received a hard, stinging slap across the face.

"Shut up, bitch. I own you now. You do what I say, when I say, without question. Do you understand?"

After a brief moment I answered, "Yes, Karen, I understand. I'll do whatever you say."

Reaching down with one hand, Karen stroked my cheek gently, whispering in my ear,

"Good boy, Brian. I know you enjoy this as much as I do. You're so hot as a submissive little slave boy." I hung my head, but the blush that spread across my face expressed my pleasure better than words ever could have.

Holding out the collar in one hand Karen said, "Here's how this is going to work. Whenever mom and dad aren't home, you are going to be completely naked, wearing this collar to show that I own you. You'll do what I say, when I say, and you'll love every minute of it, won't you little b*o?"

My cock was so hard that it threatened to split the front of my jeans. With a sigh of feigned reluctance, I gave in. "Ok, Karen," I said.

She glared at me, then slapped me across the face again. "Ok, WHAT?!?" she shouted.

"Ok, I'll do whatever you say, I'll be your slave," I murmured, blushing and bowing my head. Even as I said the words, however, my cock throbbed with anticipation.

Karen once again favored me with a beatific smile. "Good boy," she said. "Now strip." I quickly removed all of my clothing and remained kneeling in front of my sister. She couldn't help but notice my raging hard-on. "I knew it, Brian, I knew you'd love this," she whispered, as she reached down to stroke my cock. Straightening, she fastened the leather collar tightly around my neck. "Yeah, you're my bitch now, aren't you little b*o?" she whispered. Apparently I didn't answer quickly enough to satisfy her, because she reached down and squeezed my balls painfully. "YOU'RE MY BITCH NOW, AREN'T YOU?" she shouted.

"Yes, Karen! Yes, I'm your bitch, your slave!" I said. The pressure on my balls eased instantly. Karen smiled at me, and patted me lightly on the cheek.

That's right, good answer," she said. "Lick my boots, little b*o; lap my boots to show me what a good slave you are." Still on my knees, I bent down until my head was at my sister's feet, and I obediently ran my tongue along the top of her boots. As she continued to whisper her approval, I licked every inch of her boots, polishing them from toe to heel. Although I wouldn't admit it, even to myself, I loved the taste of the leather and the feeling of degradation as she forced me to lap her boots; it was an incredible turn-on. Finally, she grabbed me by the hair and pulled my head up, away from her feet. "Mmmm, you are a quick learner, I think it's time for the next part of your initiation," Karen said. She snapped a leash to my collar and began dragging me down the hallway, tugging hard on the leash. "Come on, bitch," she said. In an effort to comply more quickly with her orders I began to get to my feet. "NO!" she shouted, slapping me hard on the ass. "You're my slave, you crawl on your hands and knees." I dropped to my hands and knees and crawled after her down the hallway until we reached the bathroom.

Once we reached this room she smirked at me and said, "Good boy. Now lie down in the bathtub and prepare to enjoy this. It's time to mark my territory." I wasn't sure exactly what she meant by that last remark, but I obediently crawled into the bathtub and lay down face up. Karen smiled at me. "Good job, little b*o, you do learn quickly." She removed her panties and hiked up her mini-skirt so that her beautiful bald pussy was revealed. She then squatted directly over my face and spread her pussy lips. "Open up, Brian, you're going to love this," she said, and proceeded to spray hot piss all over my face and down the length of my entire body. Her piss felt wonderful, hot and wet, as it splattered over the entirety of my body. I couldn't resist opening my mouth wide to taste her, drinking down her hot, acrid urine in eager gulps. "Mmm, little b*o, you're a natural," Karen said. "You're going to make the perfect slave." Bending down further, Karen squatted over my face, her knees on either side of my head and her luscious pussy directly over my mouth. "Clean me up now, slave," she murmured, as she slowly ground her wet pussy against my face, "lap me clean with your tongue."

I groaned with desire and plunged my tongue as deeply as possible into my sister's hot, wet, tunnel, wanting to taste as much of her as I could. Because of the narrowness of the tub and our position, my arms were pinned at my sides, and I could use only my tongue to pleasure her, I lapped desperately, trying to run my tongue over every succulent inch of Karen's womanhood, then plunging my tongue inside her, sucking her, tasting her urine mingling now with her own natural wetness as her arousal grew. Karen ground her hips down hard, forcing her sweet pussy further onto my mouth and tongue. Balancing herself with the palms of her hands flat against my chest, she rode my face.

"That's it Brian, you little fucking bitch, tongue fuck my cunt, eat me out." Her breath was low and labored now, and she moaned as she neared climax. "God yes Brian, just like that, don't stop! You're gonna make me cum!!" Karen's body shuddered spasmodically as she screamed in orgasm. I thrust my tongue inside her wildly clenching pussy as deep as I could; then, sucking hard, I was rewarded with several splashes of her cunt juice. Karen remained seated on my face for a moment longer; then, getting up, she sat on the edge of the tub, gazing down at me. She looked absolutely glorious: her hair slightly disheveled, a light sheen of perspiration on her forehead. She was still panting softly, and the expression on her face was one of blissful rapture. "Brian you are such a good boy. You made me cum so hard," she murmured. She thrust two fingers inside her sopping cunt; then, leaning forward, she rubbed her cum-covered fingers all over my lips before sliding them into my mouth. I eagerly sucked them clean, unable to get enough of the musky taste of her womanhood. My cock was rock hard and aching with need. Reaching down, Karen encircled it with one hand, stoking and squeezing lightly. The lightest touch of her fingers made me writhe and groan. "Look at this nice, hard cock, Brian. Is my slave-boy's cock all hard for me? What do you want, Brian? Do you want me to fuck you? You do, don't you?" As she said this Karen was staring into my eyes, gauging my reaction, a wicked grin on her face as she continued stroking my cock. I could only nod my head desperately; the feeling of her hand was almost overwhelming. "Tell me little brother; you have to tell me what you want," she whispered seductively.

"Yes Karen, please, " I gasped. "I want . . .I want you to fuck me! Please." The last word ended in a whimper as she tightened her grip on my engorged dick and stroked faster.

"Ok, little brother, I'll give you what you want. Let's go." Tugging on my leash she allowed me to get out of the tub and then she led me, still crawling, back out into the living room. "Stay on your hands and knees until I get back," she ordered.

"Yes, Karen, " I whispered obediently.

When Karen returned she was carrying a small black bag that she placed on the floor beside me. "Spread your legs and arch your back, get you ass up high."

"What? But Karen, I thought--"

"Do it NOW, bitch!" She yelled. This was accompanied by a hard slap across my ass. I quickly arched my back, lowering my head with my ass in the air. "Mmm, that's a good boy, Brian. Much better.." from the bag she removed a small bottle of lube and squirted some against her fingers. I suppressed a yelp of surprise as I felt her slippery fingers caressing my asshole. I groaned as she slid one finger inside up to the knuckle and held it there.

"Does that feel good, Brian? Do you like me fingering your tight little butt hole?" Karen was thrusting in and out now, easing her finger in deeper on every thrust until I felt her entire finger inside me. Slowly she slid a second finger inside me and held them there. I winced with discomfort at first, but she allowed a moment for my muscles to adjust and then began finger-fucking my hole again, thrusting slowly and gently at first and then, as my muscles relaxed further to accommodate her fingers, she began thrusting more roughly and quickly. The feeling was incredible; there was some initial pain, yes; but mixed with the discomfort was an ever-growing sensation of pleasure. I was whimpering softly now, and thrusting back against Karen's hand eagerly.

Noticing this, she smiled that arrogant and sexy smirk. Leaning down, her mouth close to my ear, she whispered, "You like that don't you, bitch? You love feeling my fingers sliding in and out of your ass, stretching your tight little hole, don't you?" As she said this, she thrust hard, burying both fingers completely inside my hole and holding them there for a moment before continuing to thrust.

My breath left my mouth in a low moan and I heard myself mumble, "Yes, I-I like it."

"I knew you would, Brian; you're such a naughty little slut-boy." With her fingers still embedded deep in my hole, Karen rummaged in the bag with her other hand for a moment and withdrew a small red butt plug, narrow at the tip and widening out to a flared middle section before narrowing again where it met the t-bar at the bottom. "Open your mouth Brian; I want you to suck this plug and get it good and wet, because soon it's going to be buried inside your asshole."

Before I could protest, Karen shoved the toy between my lips and into my mouth. I sucked as much as I could, suddenly extremely motivated to make it as slick and wet as I possibly could. After a moment, Karen took the plug from my mouth. She added a bit of lube to it and positioned the tip of the toy at my hole. "Just relax baby, and in a minute this will feel really good, I promise." She slowly began pushing the toy inside my asshole. At the same time I felt her slippery hand wrap itself around my hard cock as she began jerking me off. The plug slid in deeper and deeper, until I felt my hole stretching to accommodate the flared middle section, the widest part of the plug. The pain was intense for a moment. "Karen, wait, stop, it hurts!" I gasped.

She held the plug there for a moment at its widest point. "You just have to get use to it, little b*o. Try to relax your muscles."

Gritting my teeth against the pain, I tried to relax and concentrated on the sensation of Karen's warm, slippery hand on my hard cock. With a gasp, I felt the plug slide all the way into my hole. The pain was gone, and in its place was a very pleasant feeling of fullness.

"Good boy, Brian, you took the whole thing. We're just going to leave that in there for a minute to get you nice and stretched out so I can give you what you asked for."

I was confused. "Karen, what do you mean?" I asked. Karen had come to stand in front of me and now looked down at me, an arrogant, sexy smile on her face.

"Don't you remember, Brian? You asked me to fuck you, and now I'm going to." I watched as Karen took a strap-on harness from the bag and a dildo. The dildo was a large black cock, very large, at least ten inches in length. Karen slid the dildo into place and stepped into the harness, tightening it around her waist.

My eyes had widened in alarm when I saw the size of the dildo. "Uhh, Karen, I don't think that--" I began.

"Shut up, bitch. I AM going to fuck you with this, and I'm going to fuck you hard. Before I'm finished you'll be begging for more. Now do something useful with your mouth and suck my big, black cock." Karen grabbed me roughly by the hair, pulling my head up as she pushed the head of the dildo between my lips and deep into my mouth. I gagged slightly and began sucking, taking as much of the rubber cock into my mouth as I could. Karen was shoving it in deeper with every thrust, fucking my mouth. "Yeah, that's it slave-boy, fuckin' suck my cock! You look so good with your mouth and lips wrapped around my dick. I think you've sucked dick before, haven't you, Brian? You're a natural at this, little b*o." finally, Karen withdrew the dildo from my mouth, leaving me with watering eyes as I gasped for breath. "Time for the main event," she said.

Moving around behind me once again, Karen withdrew the plug from my hole, again holding it still for a moment at the very widest section. My ass stretched around it fairly easily this time, and whereas before the pain had been horrible, now there was only a slight sense of discomfort. Karen shoved the plug in and out a few more times before removing it and setting it aside. I felt a curious sense of emptiness now that it was gone. "Oh, by the way, little b*o, there is just one rule before we start. You're not allowed to cum until I give you permission. Do you understand?" Karen paused a moment and then slapped my ass hard. "I said, 'do you understand?'"

"Yes, Karen, I understand. I'm not allowed to cum until you say so."

"That's right, little b*o. Now prepare to enjoy this." With a single thrust, Karen shoved the head of the dildo inside my hole. The pain was intense for a moment, and I winced and tried to pull away. Karen grasped my hips firmly and slid several more inches inside my now stretched and gaping ass before pausing. The pain subsided quickly, replaced by the pleasant sensation of fullness. "Do you want me to stop, Brian?" Karen demanded.

I hesitated for a moment and then whispered, "No."

"No, what, bitch? Say it!"

"No, don't stop fucking me," I murmured, feeling my face flush and redden with a combination of embarrassment and excitement.

"That's what I thought." With that, Karen thrust into me deep and hard, burying her cock inside me up to the balls in a single thrust, then withdrawing to the head and burying the full length inside my hole again. The feeling was the most intense mingling of pain and incredible pleasure that I'd ever known. My cock was rock-hard and throbbing, and I was moaning loudly. Karen's thrusts became harder until she was slamming in and out of my now-gaping hole, fucking me balls-deep so hard that my face was pressed against the floor with every thrust. "Yeah bitch, take my cock! Take every fuckin' inch of it! You love it, don't you? Don't you?!?" Karen growled as she continued to pump in and out of me hard, her hips slapping up against my upturned ass with every savage thrust.

"God, yes!" I practically screamed. The feeling of being fucked so hard, of being dominated and degraded like this by my own sister was the most incredible turn-on that I'd ever experienced. I felt the cum building in my balls as they tightened against my body. Every thrust of Karen's cock pushed me closer to climax.

"Yes what, you little slut?!? Tell me what you like--beg for it!"

"I love your big cock inside me! Please, Karen, please, fuck me more, fuck me harder!"

"I knew you were a cock-hungry little whore, Brian," she said as she continued to slam her cock into me with a fury. Every thrust was now accompanied by a hard slap on my ass cheeks.

My whole body was tensed and quivering; even without touching my cock, I knew I'd reached the point of no return. "Karen, please, I have to--may I please cum?" I begged, my words mingled with the moans and grunts that her savage fucking forced from my lips.

"Go ahead and cum, whore! Cum while your sister fucks you in the ass!" Karen buried her cock balls-deep inside me one more time. As she did so, she reached down and stroked my cock. The merest touch of her hand was all it took. Cum erupted in several hot, sticky blasts from my dick as my entire body convulsed with the force of my orgasm. I slumped against the floor, utterly spent and panting for breath. Karen, her cock still deep inside me, lay against my back, her full, lush breasts pressed against me. Just at that moment I heard the front door open and the sound of footsteps moving toward the living room.