One spring night, while waiting for a train, a group of guys started chatting with me. I gave one of them my number, and 6 months later he contacted me.
I went to his place, typical Netflix and chill. After we had (very bad) sex, we went out together to walk his dog.
As we were walking, he spotted someone walking towards us. He suddenly told me thought it was his girlfriend, which I certainly didn't know about.
When she approached us, he introduced me as a friend. I just smiled and shook her hand.
As we were talking, the guy made an awkward suggestion that we should have a threesome. His girlfriend went nuts. I left, and took the bus home.