Are you sure we are not related? Your family sounds an awful lot like my own.

I found that the nuts in the tree dont bug me too much because I am FIRM, and wont tolerate the BS that they throw at each other. My aunt will call and beg pain pills from my mother, and then give them to her drug addicted grandson. My sister wouldnt spit on me if I was on fire, and I would be just as happy for her to leave me alone, as I could never repay the bill.

I find it best to just be upfront, firm, fair, and consistant that this WONT be tolerated. This is your ONE and final warning. Next time, she gets the bill for the doorknob, and you will allow the cops to haul her off for B&E, property damage, and public nuisance. Once they see you are willing to allow them to be arrested, they back off and bug someone else in a hurry.

Hang in there.