Me and two of my friends share a house and the bathroom is right next to one of their rooms and while the walls are fairly thick you can hear everything through the door.

It was late at night and I was just heading to the toilet and I could hear her moaning through the door and it turned me on so much to just listen to them going at it feet away.

I quickly closed the door to the bathroom and sat with my back to it to I could still hear them going at it and started to rub myself over my leggings. I lost all sense of this was wrong when he started describing how tight she was and how incredibly wet she was and slipped my hand under my legging and pushed a fingering in my surprisingly wet pussy and starting fingering myself and grinding my hand into my clit at the same time.

I started imagining it was me in her place and before I knew it I'd cum all over my hand on the cold bathroom floor listening to my close friend get fucked, I felt so horny after that as well at what I had done and the fact I had to get off at just listening so them.