My cousin and I have been best friends since we were kids. We're 19 and we do pretty much everything together. He was chilling and mine with me and my girlfriend two weekends ago and I let him have s** with her. He was a virgin and kinda desperate to get laid, and although I love her I'm not at all a jealous guy and we're pretty both open in that way. It was kind of impromptu too although we've all joked about it before. She started coming on to him, kissing him and eventually taking out his d*** and sucking it. I was there but had no interest in joining in. She got naked and helped guide his c*** inside of her. He came in less than a minute. He had no condom on but she's on the pill and he's a virgin like I said that was fine. She asked me if I'd join and I said no but she pleaded. He got hard again almost instantly. She sucked my d*** while he started f****** her again and then she told me to lube her up and take her in the ass. It was weird cause our b**** kept hitting each other and I could feel his c*** moving inside of her through her vaginal wall. She talked really dirty and made us both c** soon after. What a f****** weekend. Still can't really come to terms with it.