Sweaty shorts
We had been at the gym for an hour or so and had more or less finished what we wanted to do. I had been on the bike and Kim had spent sometime on the treadmill. I loved watching her on the running machine. She's got a lovely arse and whilst she says it's too big, I don't think so. She looks great in her lycra shorts and as it was a warm day I could see the damp patch between her buttocks where she had been sweating. We walked back to the car to go home and I could feel my cock starting to ooze...