I agree with you that the children come first, but she may have just been ill expressing understandable frustrations. He's got to make sure that he's taking good care of her and making sure she knows he appreciates the sacrifices she makes in dealing with an angry vindictive ex. Some people just aren't strong enough to deal with that, though, so who knows...it's a really shitty situation.
I think that is where the relationship ended. I don't think she realized or I did not tell her enough that I appreciate her dealing with that cvnt!