I am so so sorry for what you went through. Yes, there are mental disorders that would cover Mary's behavior - probably several possibilities depending on other factors. I can't remember enough from my abnormal psych class to sound too intelligent, but if you think about her, she probably exhibits other inappropriate behavior.

I could be wrong about this since I don't know her, but she doesn't actually seem just nosy. She seems to be controlling and I suspect the rummaging isn't nosy, but opportunistic. She reminds me of a certain relative of mine who got his hands into my Grandma's business and managed to walk away with most of her assets before I figured it out.

You can't undo the damage Mary has done. It might make you feel better to talk to Mindy and get it off your chest, though.

Hugs to you for what you've been through. That is truly awful.