They were a married couple, and I was best friends with them both. We had talked about it happening several times before, but never actually did it. The night it happened we were all drinking with several friends and somehow just wound up in the bedroom. Myself and the other girl were wearing onesies and he undressed us and then started kissing us. He started having sex with me first and then her. I was a little hesitant to initiate things since they were married and I didn't want to upset her. At one point I went down on her while he had sex with me doggy style, and then she went down on me while he did the same to her. She got on top of him and I sat on his face. It actually flowed pretty well and nothing was weird the next day.