Thought I'd give an update... I have better times with the kids than when I was with ex.
It's starting to feel like I've dumped ex rather than the other way around. Ex now wears sexy clothes when she sees me, and texts me in the middle of the night about the kids when they are with me. It seems like she's trying to get a reaction from me but I am not getting drawn into it as I'm sure it's NPD hoovering and not genuine. I can now see it so clearly that I laugh to myself that ex seems desperate. A mutual friend said it seems like ex and I have been getting along better. I was surprised to hear that as I keep myself to myself with minimal contact and they couldn't have got that impression from me.