I am 14 and my sister is 17. My parents are divorced but still live in the same town. My older sister hates my mom and wishes she was dead so she lives with our dad. She thinks it is ok to just show up to our house (our moms house) and just check the mail and walk in and do whatever she wants. My mom still loves her but she does not want her to just come anytime and do whatever and leave. The question is: When I'm home alone and she bursts through the door and will not leave, what do I do? My sister has no sense of discipline and finds fault in everyone but herself. Am i supossed to like call the police on her if she doesnt leave? What could i do??