Name changed so I don't out myself. Basically been with new DP around 11 months, he has 7 year old twins with his ex.
Relationship ended amicably so no issues there, I feel I have got to know his DC's and have a good relationship with them. If it's worth anything his ex seems lovely never any issues or resentment or anything like that, I accept although I do not have DC of my own his children will always come first. I would never expect any different tbh!
Anyway his car was written off last month and we haven't been able to replace it yet, so I have been dropping the children off at their mothers on Sundays ready for school Monday as a favour.
First few times he came with me, then the last 2 times I went alone as he had to go into work on short notice (project deadline coming up).
Anyway me and his ex were chatting the last time, she invited me in for a coffee. It was really nice actually, chatting about the children (we'd taken them to a water park over the weekend) she was showing me some pictures and things like that. We got on really well, discovered we have a lot of interests in common and the same sense of humour. Laughing about how this could be potentially seen as weird etc etc.
Now obviously I'm not expecting us to be best friends or anything like that, but I think it's nice for the children we get on have a positive relationship and can pass on info about the children. I thought my DP would be pleased we both got on, and not just for the DC, as we are going to have to be on each other's lives.
Well no, he went spare saying is disrespectful to him, confusing for the children and just weird.
Did I overstep the mark or is he being childish???