At the end of the night as the party wrapped up there were three of us left, my gf and our other friend. We were all staying there that night. As we finished our drinks my gf not so quietly said she wanted to go upstairs and fuck me. Our friend overheard and invited us to stay there and give him a show. We decided why not, stripped and started having sex in front of the fireplace in front of him. He pulled out his cock and started to masturbate while he watched. We moved over to the chair, I sat down, and she sat back on my cock then leaned back and spread her legs to give him a good view of me fucking her pussy. He came and walked up close slowly stroking himself still as he got close my gf grabbed his cock and started to help stroke him. She looked back at me and I knew what she wanted, I nodded and she leaned forward and started to suck him off while she rode my cock. He soon blew in her mouth and the cum dropping out and running down his cock while she continues to suck made her start to cum, her pulses around my cock were so intense they pulled the biggest load out of me she ever had.