Change the locks, remove her and her stuff then claim no knowledge whatsoever, she's nuts I tell you, keep her away from me, then file a restraining order.
Or, option B: Never give anyone else the opportunity to use that law. Once burned, twice shy.
I think fondly of an event from my youth. My grandmother had a small rental which was vacant. My dad was checking on it late one night when he saw someone strike a match. He zoomed up the stairs and into the place. Seconds later someone came through the window, closed at the time, and landed on his head. The second was kicked down the stairs and my dad stuck a 45 in his ear and told him not to come back or he’d kill him. This is a true event seen through the eyes of a ten year old. It was about 1955 and all was right in the world: fewer laws and lawyers. I also knew not to F with my dad.
We found out, later, that Jo would have been guilty of a Domestic Violence beef if she had. There is no defense, and worse, thanks to that Ultimate Monster Lautenberg, (May he spend FOREVER screaming in Hell!), a DV conviction means you lose your rights as an American, forever.