Step-father is no longer living with us and stepped away from Mom's care. There has always been issues between all of us as mum kept going back to him over the past thirteen years. Now mum has dementia and I had to become her full time career, he believes that I am the enemy of their happiness and must go. All I do is mainly attend to mums hygiene, diet and wellbeing. I have repeatedly expressed that I don't want to interfere in their relationship and that I'm just there to care for mum. He talks to her about his issues with the situation and how I'm effecting their time together and changing her home, her life and whatever else that he has issues with. His arguments are one sided, warped and ill informed. I defend my position by stating that I'm here to just look after her. Mum settles down until the step gets another bee in his bonnet. Now he is becoming physically violent towards me as well as verbal and physical intimidation. I just want to ensure my mum is living a safe and happy life. I'm worried what he will do next to me and my mums safety. Please help.