mother widow and daughter tortured by son and daughter in law

My mother is widow and have 2 children one me and her son who is my real brother for outer world but for me he is a bloody cheap who tortures me and my mother by vulgar language which U cant hear and i can't write..I will not hide anything..he and his wife is fully shameless who threatens me and my mother that both of us have to work like servants for her in the sense that we will have to accept her every bet or both will make a scene as both stand naked in front of us..and will do obscene things that by shame me and my mother would automatically leave house and i m unmarried and she threatens me that she can stand nude but will spoil my image of my character at any cost in society..and other important thing is my mother is penicillin sensitive and she threatens me that she will kill my mother..?