[M] - one of the most amazing experiences I’ve ever had. Having sex with my girlfriends sister while we were still dating!
There had been sexual tension for over 2 years. My girlfriend was one year older than me and the sister one year younger. So all essentially same ages. We were always doing things together and the tension was just always there. Well eventually we started to slowly “act” on the tension. Just a little more flirt here maybe a longer hug or extra touching. Finally the day came where it was time to just make it happen and it was without a doubt, that first time, absolutely perfect.