HI RBG, I would say if you've chosen to move into a new R, you've presumably closed the door on your M. And if this is the case, why worry about what your ex is doing or why?
As for the coparenting aspect, I don't think you need to focus on or try and help her, so long as the kids are doing okay. Who she chooses to be friends with or not is her call after all. I don't think it's up to you to try and help or fix things..
JMHO of course
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus