She’s still a child not an adult. She still needs support and guidance from her parents. Instead of letting her live on her own, you should first prepare her. Give her some house chores or something for her to learn basic responsibilities. Giving her home responsibilities will make her more independent. A two-year-old has not yet learned right from wrong. This is not disciplined it is abuse. Beating with the belt is never discipline it is always abuse. Spanking is with a bare hand to raise attention not to harm. Your mother should never be allowed around this child. Your 10 year old is just being malicious; and you should tell him that your daughter is just as much family as he is. And to top it off and really sink it home, explain to him that you chose his sister, you didn’t have any say in getting him. I told him I had, but assume he would have given me more had it been insufficient. You can always bring cash and tip the server on the way out to make sure they are taken care of.