Friends with Violations

I’m a 26-year-old single bi woman. Sometimes my roommate/best friend and I have drunken threesomes with men. We’ve had some great one-night stands (less scary with a friend!), but recently we slept with a man I’ve been (drunkenly) sleeping with over a period of months, my “friend with benefits.” I shared my FWB with my roommate because she wanted to have sex, and I shared my roommate with my FWB because he wanted to experience a threesome. I told my roommate afterward that I wouldn’t like it if she slept with my FWB on her own, and I told my FWB that we should have discussed having a threesome before it happened. We went out drinking another night, I left early, and they wound up sleeping together. I was upset with my roommate, because she knew how I felt. But I am disgusted and angry with my FWB because he had to “work”...