Last night, my roommate and her boyfriend stayed over. We have an agreement that we won't mind each other masturbating or having sex due to the lack of privacy. We were watching a movie and he was sitting on her bed with his back against the wall, both of them naked, with her on top. They went through most of the movie before they came. I was in my bed, also naked for comfort, but with a sheet over me. I admit, I was playing with myself while watching them, but tried to make it look like I was just watching the movie. I noticed she let him cum inside her. After that we all fell asleep, but I woke up to them fucking again. After he finished in her, she got up, got dressed, and went for coffee. When I got up, he asked if I wanted to have sex. I was shocked because he would be cheating, but also I was really horny and haven't had sex in a long time. I am pudgy and not traditionally attractive, but I gave in and got into her bed. He got on top of me and, when he saw I was wet, he just put it in me. It felt so good as he fucked me, but I never thought about telling him where to finish and he came inside me. It was a lot, considering he had just had sex. After we finished, I had just put my panties on and my roommate came back. He was already dressed and left as she arrived. She had gotten me a coffee and we sat and talked on her bed. The whole time, my panties were getting soaked from her boyfriend's cum. I kept imagining how wet hers must be. After we were done talking, we hugged and she playfully pinched my nipple. I felt bad, but it was so hot.