Domestic Violence

I am married for 2 years, though it was a love marriage but was unable to know my partner properly before marriage, my mother is a cancer patient, my wife does all that which is actually separating me from my mom and the rest of my family, she was a divorcee, her mother is also like this, they don't have any relation with their relatives, she wants to dominate me and my mom, and if I am not then she screams on the top of her voice claiming that I am beating her inside the room, and tries to hang herself with the ceiling fan, she has done this enormous times, she has even beaten my mom may be twice in these 2 years, she always criticise me and my mom at our back to all the localities and the family relatives, she passes on secrets of everyone to all others and used to create a massacre within themselves, and if u catch her doing this then she does the same thing (screaming and hanging her with the fan), I have started feeling that she is a psycho, I can't hold this anymore in my life, may be she is getting influenced by her mom, or may be she is like this, may be these are the reasons of her last divorce which I never wanted to investigate before, I am helpless at this moment, kindly assist me.