Wow, did you know all this about her when you married her?
Damn, I can't believe you even entertained going back to that trainwreck. No amount of loneliness is worth going back to living with someone like that!
Seriously, best to leave her to herself and her family..and get yourself the best damn attorney you can afford to fight for your child and get a proper settlement on you property.
Your life is too short to invest any more of your time, money and energy into this woman.