Betrayal or get over it?

[Nonomrnono]

My exdp and I have split and we have 2 dc. I just want to see if I'm being overthinking. My ex had a female friend for a few years. he'd invite her to the house when I was there, she'd play with the dc etc all normal. Now we've split, he's in a relationship with her and I don't know if I should feel a type of way about her being around my children, playing with them etc in hindsight... Would other people care or should I just get over it?

For your own sake, I would let it go. Highly likely something was going on whilst you were still together but, neither of them will ever admit it and you will just drive yourself mad wondering. They aren’t worth your headspace. Carve out a great life for you and your dc…(and make sure he pays everything he should).

I would let it go it’s not a fight that needs to be had. Potentially they may have had more than a friendship while you were still together but the reality is you will never know.
you’re separated now anyway so it doesn’t matter, move on with your own life and find someone else or just date etc for a bit.

Oh I wouldn't fight about it or even bring it up to him. I'm just thinking now, he invited her here around our dc and she had a relationship with them from when they were very small so it feels... I don't know the word... And now she's their stepmum

No issues with the dc, thankfully he's always been a good dad