Sounds like she needs to be launched into orbit...of Pluto (pretty far away. It'd take her a long time to get back)

Hopefully she'll figure out what a schmuck she is and leave him alone. (not betting on it)

Change all your phone numbers, get a restraining order, get a conceal carry permit, or a taser...baseball bat...whatever. Tell your son he needs to just walk away (run!) and get away from her. She's not worth the trouble.

She's been destroying your son's stuff, but it's only stuff. He can get new stuff. But she's also destroying any faith he might have in the world, and it might take awhile to get that back after she's through with it.