Can I make a suggestion? Be mindful of your son's feelings in this. When kids get caught in the cross-fire, it can be difficult for them.
My suggestion is to take the high road. The best way to fight this is to not fight. Rather, talk to a lawyer about what's next and if there is a continuation of this kind of thing, talk to your lawyer about what your options are to get her to stop pulling the kids apart for their sake.
And keep a journal of all of it. Even the conversations when she is in the background. Document document document. When the time comes, you may need to be able to rationally (and that's key) detail that information to the courts.
There's just no end sometimes. I feel ya!
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."
