I'm 24 years old and recently lost my dad while i was in another country. It's painful because I wasn't here with him before he went and wasn't a helping hand for my mother and sister. My sister has issues and has resorted to violence against mum a few times. It happened again over a small issue recently and she lashed out and hurt mom. I intervened and she attacked me too. I was almost going to retaliate but I only blocked her. She hurt mother again and i intervened again. She blames us all for her problems and now I don't know as a son how to handle this situation. I tried talking to her like calling her for dinner but she just doesn't respond. I know my mother and sister are equally at fault and so am i. But i don't know how can I stop this violence without causing someone else to get hurt. Anyone has any advice?