Reluctant threesome with my roommate and his girlfriend. [MMF]

[this is where I asked for advice](https://www.reddit.com/r/sex/comments/72d3wt/my_roommates_girlfriend_brought_up_the_idea_of_a/)
Sooo. Yeah. 90% of the replies advised against it but it was Friday night, I just failed an exam and I was drinking so I decided fuck it… literally. It started just sitting in the living room watching a movie and drinking, and she said they were going in the room to ‘have some fun’ and that I should join them. So after about 5 minutes of trying to make up my mind I just decided to go in and let whatever happened happen. I opened the door and they pulled back the cover and I took my shirt off and got in. First she just pushed mine and his faces together and we kissed for a while and she sucked us both. Then we started double teaming her, I was going to fuck her and she was giving him head. This is where it got weird because like, do I *really* go hard on my friends girlfriend? But he gave an approving look so I just did it. Then he walked toward and kind of layed me down and he started sucking my dick and she was licking underneath. At this point I’m thinking to myself “I actually have a boy and a girl sucking my dick at the same time!?!?!” Then we both ate her out, kind of kissing while doing that, but not really. Then he starts fucking her and I’m basically watching for like 10 minutes. They fucked and both came and they started sucking my dick again. I told them I was close and the biggest surprise was them sharing my nut. They waited for me to cum and they swapped it between their mouths. Not sure who swallowed it, but afterwards All three of us kissed and it was so fucking hilarious. I dont know why but we all laughed for minutes and then it was over, I went to my bed and slept the best ever. It hasnt been awkward between me and my roommate, we just kinda randomly look at each other and laugh. She hasnt been over yet, not sure how it’ll be when she does come over.