So, ExH and SM have been married for about 18 months and together for six months before that, so she's still relatively new in their lives (and his, frankly!).
I didn't choose for her to be in my children's lives nor did I consent to devolve any maternal or parenting duties/rights to her.
To be honest I barely know the woman, aside that she's a part of the same culty fucked-up church my ExH goes to and therefore probably had some questionable views.
But aside from that I genuinely have nothing against her and think she's probably a decent person, but doesn't seem to understand boundaries and quite possibly is attempting to compete with me a bit or trying to prove something. (I'm sure ExH will have painted me as the Antichrist. He thinks I shouldn't be a parent at all because I have a history of depression, amongst other things.)
Or maybe she's just OTT naturally...
Probably is that, mostly. She ended up coming to a 'parents information evening' at DC1s new school (again, I wasn't expecting her to be there) - which was all deeply dull stuff about labelling games back and how much money they need for tuck. I told DC1 any snippets I thought were interesting, DC1 was deeply uninterested.
SM wrote a two page fucking REPORT on the evening and emailed it to DC1. I mean, SERIOUSLY!?
That said, I've gone out of my way to make her feel included and welcome. After all, she's married to my ExH so she's got enough to deal with.
I'm not about to storm down there and go in all guns blazing, or eff and blind at her. It's not how I feel, or something I would ever do.
But I do feel that she's positioning herself in a primary parenting role, which she's not. And yes, it pushes my buttons, makes me feel threatened and resentful, and also like I'm being pushed out - certainly with regards to school.
And while I am happy that she cares about my DC, no, I don't feel like I should be 'grateful'. It's a fucking privilege to be invited into the lives of other people's children. Or any children, frankly. They're not a chore. ExH probably should be, because yes, she's definitely picking up a whole load of domestic 'slack' over there.
I won't be even attempting to talk to ExH, as he's an abusive controlling fuck who can't communicate unless he's issuing orders. Not only would it be pointless it's not healthy for me. We have a perfectly civil logistical relationship mostly via text. I won't go anywhere near more than that.
So I know that I do need to address it with her directly like grown women. And at least I'm mostly reassured that AINBU, in the eyes of most. Plus some useful insights from other SM on here - for which I genuinely thank you. It'll be a fucking awkward conversation, but hell, I've had worse.
(And yeah Mother will do. I'm the default and don't need a prefix, ta. BM really grates. It's not about whose vag they tore their way out of either, (although it's worth pointing out that I'm 5ft1 and they were both 10lb-ers meaning I required major reconstructive surgery). It's about who has been mothering them their whole lives, staying up all night, changing nappies, giving up freedoms, career opportunities, making sacrifices and struggling - often alone. We can discuss equality of mothering status when she's done even half of that... Until then, it's mum and everyone else, frankly.)