If your partner, a week before you and him had got together, had kissed a work friend he'd had for a year. Then she apparently wanted to ',take it further' but he told her that they shouldn't and said, "I'm interested in Zebrasz".
There was a group photo of them also around this time and she was holding his hand on the picture.
He tells you everything and that she had previously "made it clear she liked him". One day she had a one night stand with some other guy, and everyone thought it was your partner )Before we got together)
Once together, everything seems great with him. They're in the same friendship group so you meet her and she seems friendly and nice to you.
Albeit a bit awkward, it was all fine and then he gave me his old phone as mine no longer worked. Deleted the old texts on it and there was one from her which was dated from an event he'd gone to. It said, "I'll definitely see you later then! Yayy! Xxx" he had never mentioned meeting or seeing her at the event.
Then one night he phones you up whilst on a night out, and says he saw this friend in a club, and she kept "Trying to dance with him, and he had to keep pushing her off him."
Obviously I was shocked. I questioned him about it a couple of days later but he said, "I thought you'd trust me."
I did, but I was annoyed she was doing that knowing full well he was with me.
Anyway, would you feel a bit uncomfortable here? Ultimately the person has chosen you and chose not to date her. Kissing just days before we got together is a bit dodgy though, there was obviously some level of attraction there , but he 'chose' me ultimately.