Playing with my friend’s boyfriend [cuckhold]

My girl friend and I usually go out clubbing alone together, however this time her boyfriend had the weekend off and decided to tag along. Everything was going super well, he got us all our drinks and allowed us to dance with each other & have fun. We went to about two other clubs until we inevitably called it a night and decided to uber back to her apartment, where her and her boyfriend live together. We decided we wanted to continue having fun and kept taking shots and dancing to music she had playing from a small speaker. My friend doesn’t usually drink this much, and because of this she was the first to tap out and take a bathroom break where she didn’t come back for awhile. Her boyfriend and I assumed she passed out in the room so we just kept talking and drinking, until I think the drinks hit the both of us and we started talking about his sex life with my friend. He said the sex was good but that he always craved more. The alcohol was already making me so horny that I practically dragged his lips to mine and we started making out hungrily. Next thing I know I feel his finger making his way up my dress and feeling how wet I am and he immediately began fingering me. I was moaning but quietly, not wanting to wake up my friend. About 30 minutes passed between us taking turns of me giving him head and him fingering me. We all of sudden hear a noise and behind us is my friend, who both of us thought was in a drunken sleep, wi