NC for this - would you be happy with your partner going to visit his family with his ex and the kids for the weekend? He is not invited to spend time with her family and she will often arrange stuff like this and then say that the kids are really excited he will be there too. I am not comfortable with this and it has caused a lot of problems in our relationship. I have no issue with good co parenting or days together for the kids birthdays etc but this has taken the piss IMO. I told him he was welcome to go but I don't want to be with him if he does. He has previously acknowledged the shit it's caused in the past and promised it would stop. He didn't go but has been absolutely awful to me over message. Should I just end this? For reference we've been together a good few years, don't live together. I get on with his kids and him mine. He has MH problems, which he is currently choosing not to get help with (guilt about not living with kids is high bc of this). He's much better when doing CBT. He's made me feel so guilty.