I've got two stories and both happened when I was in high school dating the same chick.
We used to always go to a buddy of mine's house to drink with all of our friends on the weekends and we would always just crash there. After a night of a lot of drinking games, my girlfriend and I--blonde, big boobs, tight body, cheerleader captain--were sitting on the couch while she was strandling me. We had already changed and were wearing basketball shorts. She was really horny, and never wore a thing under bbal shorts so I could feel how hot and wet she was down south and she pushed up againt my cock that was already hard. She had reached in my pants on the car ride over there and had felt that I had shaved, so she was wanting it at some point. Next thing I knowshe pulls aside her little bitty shorts and is now grinding on my dick over my shorts. She whips my 6 inch rock hard cock out and slides down on it. At first I was a little reluctant since there were about 10 people behind us in the kitchen playing beer pong, but she was so wet i could resist. We go pretty slow for a while but she can't take it any longer, so she starts going faster. Obviously everyone can see her bouncing up and down so they knew what was up. Two friends have now walked around the corner and you can see her feeling him up watching. Were both drunk so we dont care and she slips off her shirt where you san see her 24 C boobs. We are both really going at it, so now everyone knows. After about 15 minutesshe cums and gushes on my cock. I'm not yet done, but she gets off, and makes me wait till later that night to finish me. After sex for an hour later, she finishes me as we do 69. It was a great night. My friend later told me he fucked his gf on the counter after everyone went to bed just bc she got so horny seeing us.
The next time was in a hot tub w my friends and his gf. More to come later...