One of my family members is a bad person. They think they're better than everyone else and intimidate all of us so it's hard to say anything. They've even done something I consider to be an unforgivable crime, though I'd rather not say what. They're living with us now and it doesn't look like that's going to change any time soon. They're old and have no money, and neither do we. What should I do? Is there anything I can do?