AIBU. I have been with my partner for a year. We have three children between us, none together. Both late 30s. When we first got together I accidentally looked over his shoulder to see he was texting a woman. Let’s call her ‘Megan’. That evening, casually and seemingly unrelated (to him) I said if there’s someone else you’re interested in I’d rather call time on it now as I’m ready for something serious and not happy to be messed around. (DS father left me for another woman whilst pregnant so I have no time for men who want to have their cake and eat it too). DP was pretty clear he wanted us and only us. Cut to two months ago. We’re getting ready for bed and he gets a text late on. I say ‘who’s texting so late?’ And he doesn’t deny that ‘Megan’ is texting asking if he’s around ‘for a drink’. I’m immediately pissed off and wondering why another woman feels it’s appropriate to text my partner at 11pm on a Friday asking to go out for a drink. It transpires that he did sleep with her a few years ago but now they’re just ‘mates’. Anyway I drop it…but tonight we had a conversation about it - he brought up that Friday night ‘drink?’ incident (which had turned into a huge argument at the time) and said I can’t ‘tell him what to do’ and if he wanted to go for a drink one on one with his ‘friend’ Megan then he would and I shouldn’t have a problem with it. I said I would have a problem with it. That he would be disrespecting me and although I would never tell him what to do, him doing something that would hurt me would not bode well for our relationship. He hasn’t even seen this girl in over a year so they’re hardly best mates. Am I wrong?