My [F22] housemate’s FWB [M23] [FM]

I recently became single (fuller story): https://www.reddit.com/r/gonewildstories/comments/4yjct9/my_boyfriends_cousin_21f26f/

So I returned to University footloose and fancy-free. I kept my head down at the start of term (it’s a small campus where everyone knows each other and my bf lives quite close). I’ve spent some time DMing people on here, and I’ve had a couple of liaisons, but nothing too serious. For your imagination, this is roughly what I look like (I’m not her!): https://twitter.com/tillykeeper/status/685055430230458368

Anyway, I live with a gorgeous girl (mixed UK/Mauritian heritage, dark brown/black hair, beautiful smile), who gets her pick of all the guys. Our walls are thin, and one night I hear her breathing and talking to a guy through the wall. Then I felt her bed moving against my wall, and I knew she was having sex.

The guy started talking to her and she started moaning with pleasure. I had never felt attracted to her until then. I noticed that the guy had a deep voice and a French accent, not like her regular boyfriend. It turned me on incredibly quickly so I slipped my hand under my pyjamas and started playing with my pussy. She kept getting louder and they both let out long, loud noises when they came. His deep, satisfied moan through the thin wall was enough to send me over the edge. I curled up to go to sleep.