Rick, don't leave that house. Let her leave...she's the one that wants to end the family. Keep being the best person you can be in the moment, every moment...regardless of anything else. Do it for your own edification. And regarding legal issues...don't give an inch. Fight like hell for what's best for YOU.
"Always go straight forward, and if you meet the devil, cut him in two and go between the pieces." - William Sturgis, clipper ship captain, 1830's.