I can't stand his ex being a constant in my life.
This is such a huge consideration. You start out imagining it won’t be an issue because you’re a grown up and you can accept your partner has a past etc. But you don’t anticipate how intrusive his ex could be, both in person and through her representatives who live in your house.
I don’t really understand why my DH’s ex has such a big effect on our lives. It’s much bigger than the effect my ex has and the effect I have on my ex’s life. We mostly just leave each other to it. DS doesn’t bang on about his dad constantly (plus he knows I’d tell him off if he tried the ‘my dad does X better than you’ thing towards DH). And my ex’s parenting doesn’t affect DS’s behaviour in our house particularly. I think my ex and I have always been on similar pages parenting-wise, which probably helps. Even pick ups and drop offs are very limited contact. Often my ex picks him up from school and then just waits at the end of the path while I let DS in at drop off. It’s all very minimal and there’s no conflict. And I’m very aware that I don’t want my ex to be a huge feature of DH’s daily life.
DH’s ex, on the other hand, is a huge presence in our lives. Drop offs are a nightmare as she’s there for ages on the doorstep while the pantomime of ‘I love you mammy’ and screaming and wailing and clinging to her ensues. All the while she’s encouraging this crap. She’s always messaging and phoning DH about stuff. Even though they have a mediation agreement not to interfere in each other’s parenting, she regularly phones him to have an argument about things that aren’t done her way. The kids constantly talk about their mum in very annoying ways (I just smile and say ‘that’s nice’, but DSD in particular knows she’s being horrible in saying ‘oh, mammy’s mash is much nicer than yours’ etc, continually). The DSC’s behaviour is absolutely, fundamentally shaped by their mother’s parenting. There are all sorts of ongoing issues with rudeness, poor behaviour, outright nastiness that are a direct result of their mother’s parenting choices. And so on, and on, and on.
There’s no way you can anticipate how intrusive all this can be. Or how wearing it is to have another woman with such levels of control in your life - for years, and years, and years!
It’s not about jealousy or pettiness or inability to accept your DH’s past (or anything else MN might accuse you of); it’s about just wanting to live your life and not have constant curve balls unexpectedly lobbed through your living room window all the time.