Dude... I need a freaking shower after reading that!
You need NO CONTACT to heal yourself. Go through the motions of the break up and MOVE ON with your life! If she shows up at your door, call the cops. She was trouble in the 80's and she's still trouble now. Nothing changes if nothing changes. She hasn't changed. GET RID OF HER!!! Protect yourself. Let her husband deal with his floozy wife.