The other weekend I (21M) was at a frat party with my friends. I noticed this one girl who looked really familiar but I couldn’t figure out who she was. It wasn’t till later when someone tapped me on my shoulder and I turned around and saw that same girl. I then realized she was my exs sister!!!
We started talking and she (F18) told me she was considering coming to my college and she was with her friends that already went here. We kept on talking and we got closer and closer until I was grabbing her ass. I she said something about how her sister told her to stay away from me if she saw me and it turned me on so much. Next thing I knew we were making out.
I asked her if she wanted to go somewhere private and she said yes. I have some friends at this frat house and have been there before so I knew nobody went to the basement. I led her down there and we went into the bathroom. She took my shirt off and I did the same and things progressed from there. We ended up fucking in the bathroom and I came in her mouth. She told me she’d kill me if I’d ever told her sister and I agreed only if we had sex again. We’re snapping back and forth now.