Damn Geo, thats some fucked up shit! First of all I'm sorry dude. Ok this bitch is fuckin crazy, in my opinion, you should not sue because if yall get lawers, and go to court, she might have you investigated as well, and it could come out that you smoke weed, and its a far fetch, but it could get back to it being about ur character. one question: is ur custody arrangement of your daughters final? make sue first that it wont affect the time you get with them, because above all the bullshit, they need to come first. that bein said, I belive in Karma, and the way things happen, she will get her comeuppance, you need not worry about getting her back. If you feel the need to do something then yeah, sue her. just be careful man.