Hi everyone, I am in desperate need of advice on how I can protect my sister so excuse the long post. She is 18 and has been dating this guy for around 8 months. Before my sister had met this guy, she had briefly had an argument with his ex-girlfriend of the time who had told a huge amount of people at a festival that he had abused her whilst they were together. My sister argued with her at this festival because she believed it was wrong to be telling all of these people something so damaging that might not have happened, but I am 100% sure that this girl was now telling the truth. There was no signs that this relationship was toxic until last month. My sister had lost a few of her single, partying friends but I put that down to her not wanting that lifestyle anymore. Anyway, she came home in tears because he wanted her to admit to cheating on him which she never did. She spends every minute at his house when she is not at work, even if that means sitting with his mum in the lounge all day until he gets home. She works in beauty so never interacts with men but still gets so much hassle from him that she is secretly cheating. She was accused of having a secret relationship with her step-brother, and she revealed that he hits her. Of course I supported her through every step and told her that she must never go back there. A few days later and he 'took her back'. I was raging at this news that they had got back together. She told me that she had lied about the hitting (even though she showed me pictures) to make me hate him. I told her I wanted nothing more to do with him and for her not to talk to me about their relationship again. I was not going to be her best friend whilst she was with him. Skip forward to this weekend, he has broken up with her again. She has revealed to my other sister that he is hitting her again and she isn't allowed to shave her legs.... not even 6 hours later she is back with him. What do I do??? My mum, my other sister, my step dad and his mother know about this situation and nobody is doing anything! He controls every aspect of her life and even managed to persuade her to get him a £60 a month phone contract in her name. I can't refuse to talk to her whilst she is with him because she might need me, but I can't continue to support her as all I'm doing is encouraging this monster. I'm at a dead end. Please help!