What can I do to stop my sister from haring me?

Thats right take her to court and get that restraining order you have no other choice. Your not taking the law into your own hands since you live so far away but your dealing with a good head on your shoulders. The one other thing you can do is pray and God will take care of this situation. Talk to a Pastor or a friend that goes to church. It will keep you from going insane. My prayers are with you.