This is a fairly common tactic in divorce proceedings. I know it is hard not to take it personally, but try not to.
Talk to your lawyer asap and see what he has to say. You may have to play hard ball--bring up her drinking, her mental health history, etc. If it comes to that, please remember that it is about your daughter, not your wife. She escalated to the nuclear option immediately--as a history teacher you know what that means. Any display of weakness in your resolve will be exploited. Don't let that happen.
