Going NC for this, it's quite long so please forgive that
The background is, me (45) and DP (48) together for 2.5 years, we both have 1 DD each. His is almost 12, mine is 8. He is friends with his ex, seperated 5 years, live round the corner, they have coffee together etc, very cordial. Brought its own issues in the beginning e,g, she got upset at him finally moving on, natural I suppose. But is fine now. My ex it's acrimonious, he's an arse basically, we avoid talking besides obvious stuff around DD.
Anyway 2 years in we introduced the kids, v different personalities. His DD is quiet, now hormonal, won't speak to him about emotional issues and he avoids raising them as well. Mine is an outgoing chatter sort, being assessed for Autism because she struggles in social interactions, e.g. reading people, but getting better as she ages. Despite the differing personalities, they got on - I thought so anyway. We've done camping holidays together etc and not seen an argument between them. It was like this until the last time we got them together. His DD had recently started her period and was hormonal on the day, I mention this because it was mentioned to me as an issue. Anyway, my DD wanted 2 things to go her way, petty stuff like what packet of sweets to have, the first time his DD let her have it her way. The second time, before I could interject with my DD and tell her it wasn't right, DP told his DD to drop it. So my DD got her way again. This caused his DD to get in a very quiet mood. MY DD noticed and kept trying to talk to her, offered her the sweets back, but she kept walking away so DP went and had a word with her - she burst into tears, upset that my DD got her own way again. She was fine after a chat. Or so we thought. This all seems petty to describe but there's a reason for it.
We had already decided to blend households when that incident happened. Various reasons, we live enough of a distance apart that time can be an issue, financially it makes sense for us particularly now. Initially he told his ex, and she was upset. Then that was resolved. Then, he told his DD and she burst into tears, she wouldn't talk to him about it though. She did talk to her mum, and it was relayed that part of it was where we were thinking of moving (in the middle of where we both currently live, but that is 20 mins away from where they currently live near her all her mates) and partly my DD and specifically the day mentioned above.
Anyway, as a result of that, we decided it might help for me to move near where DP currently lives. His DD then gets to be near her pals and her mum. Since my DD doesn't currently live near her school or pals anyway, I figured a slightly longer drive to see them wouldn't make a big difference. This decision has taken about 6 weeks - in the meantime the DDs haven't seen each other. And his DD after being initially very upset has seemed fine. DP was about to tell his DD that we would move near her mum, hoping this would help, when the school called his ex yesterday and said his DD had burst into tears in class. IT came out that this is about the move but he doesn't know more than that. His ex told his DD about the change in move last night, but I don't know whether this has helped or not yet. The fact is if it's really that upsetting and it's about something we can't fix (like the location we're moving to) then we can't go ahead.
I guess I want a sounding board here. DP seems to think this all hinges on that one single day the DDs fell out. I personally think either she really hasn't been happy with my DD for all the months before and just hasn't said or it's something else, or lots of things?
The problem is the not-talking, and appearing fine for weeks. It's impossible to know if this is a fixable thing or not. I suggested he say to her that she can write it down and he'll read it when she leaves. He said he thinks it would be too much for him to even suggest this. So he will ask his ex to suggest it.
I guess I also look at the way they operate, which has only really become apparent over this issue - his DD not talking to him, but talking to her mum, who then relays the info to DP, but then DP can't say anything about it to his DD because he's not supposed to know. And - it seems pretty unworkable? It all gets marinated on for weeks and feels quite tense. DP and his ex are both like this as well. I guess me and my DD are pretty open characters. And I wonder - would we actually work as a blended unit anyway?
Part of me is thinking - we should just throw the towel in on it. And part of me is thinking that, from the adult POV, practically and financially this is actually a better situation for us all, and if it is fixable then it makes sense
FWIW my DD was excited about the prospect of us all moving in when I told her, so there isn't an issue there
Thoughts on this would be really welcome