I have searched through threads on this and can find a lot of threads of experiences of teenager - parent abuse. Unfortunately my brother is 32. He is violent, aggressive and manipulative towards my mother. They live close to each other and I live a 10 hour drive away. I'm lost. I think it's been going on for a while but I've only just found out. Her GP knows and she is being supported. But I'm worried for her. What can I do?