Gwap so sorry to hear all this, on the surface sounds like she's had some kind of mental breakdown. I can't really add to what others have said, I'd fully agree with staying put and getting legal advice. She's the one making the unreasonable demands. 12 or so years ago something similar happened to a mate of mine, he's brought up both of his daughters then aged under 5. His now ex wife had some serious heredity alcohol problems.
Stay strong.
