So about a month ago my gf invited her friend to move in with us because she needed a place to stay and also could help with bills (times be tough). I didnt have a problem with it because her friend is pretty chill, no drama, but I also happen to know she's a bit promiscuous and only dates black guys. The three of us have hung out some in the past and gfs friend has made it VERY clear that she's a size queen and would on occasion tease my gf about how much better a big dick is. Gf always laughed it off like "yeah whatever lol". So my hope was that she would bring guys home with her and we (more specifically my gf) would hear them fuck through the thin apartment walls. And it FINALLY happened last week. She brought a guy home last night. It was late and we were alreayd asleep but I heard some strange noises that woke me up. Even though I was awake I still kind of layed there and it took me a minute to realize what I was hearing. Once I realized what was going on I got hard as fuck. Gfs bff was in the other room getting absolutely destroyed. I was worried she would wake the neighbors lol. After a minute or two of listening I looked over at my gf to see if she was asleep. Sure enough she was awake and it was obvious she was listening intently. I said "babe?", which kind of startled her and I saw her remove her hand from under the covers. I thought "was she touching herself??" I didnt wanna press the issue so I didnt mention it. I said "sounds like bff brought a friend home" gf replied "yeah sounds like she's having fun over there lol" we laughed about it and she mentioned that she would talk to her in the morning and ask her to keep it down next time so it doesnt wake anybody up. This was last week. Gf just told me earlier that her friend said she might be bringing a date home later tonight and that "your bf might wanna plug his ears lol" my gf laughed and said that'll probably be the only way he gets any sleep. So I'm really stoaked about what might happen later tonight.