This story is already a few years back right now. My now ex gf (let’s call her Y) and I have been together for two years or so. My FWB (Call her M) was there in the 6 months before my relationship. I began to study in my city where Y was my classmate. A flirty, social blonde who was always laughing. Everybody knew the girl, since she was a flirtmachine with the biggest of tits you’d ever see on a girl. Than M, I’ve known her for some time before and we flirted all the time, until I asked her home once where we begun being friends with benefits. M was absolutely attractive aswell, slim, pretty face and we had such a good time together.
So the weeks passed and I had sex a few times a week with both of them. I kinda doubted between the two of them because they were both really fun to be with. But things with Y got so worked up and I just really liked the girl to much to let her walk. But the sort of competition between them became a little fierce. I’ve always tried to be as transparant possible to both of them. But the girls, fucking hated each other real bad.