Magic Forums

I'm not sure what category I should look in for the spell I need.
I live with my mother in law and she is letting her grand daughter basically move in. The problem is she has a very bad history of using heavy drugs and stealing. She was arrested for stealing just a couple months ago. My mother in law believes she has suddenly changed and I don't believe it and I don't want to risk having my stuff stolen just so the same thing that has happened every time she has been trusted ever- can happen again. Should I try a spell to be rid of her and what do you recommend.