Update! I told my bf what happened.
I told him this morning after alot of deliberation. I told him that the other night when I was out with the girls that I ended up sleeping with another man. He asked me if I went back to his place, I told him no, he took me there on the dance floor. It was a strange experience, him asking me lots of questions, he wasn’t visibly angry, just cold?
When I finished we kinda just sat there. After a while he looked at me, and told me that he’s kinda angry but also turned on at the same time. It was then I realised he was hiding his boner. I don’t know if it was him hiding it out of shame or excitement but we made love there and then.
He asked me what type of guy he was while I was being fucked and I said he was quite handsome, rugged and confident. He asked me why did I let him cum inside me. I told him it’s because I’m a slut. He asked me who I belonged to. I told him that I belonged to him, my slut pussy is his. He asked me did I want to be impregnated by a complete stranger and I said I don’t know but the thought turned me on. And for the first time in a while he came inside me. He said my slutty pussy needs to be filled up by him.