Son-Father relationship

Dear Sir/Madam - I am 41 years old and currently living abroad with my wife and daughter. I have senior citizen parents (both mother and father) living in India. When I am in India I live with my wife and daughter in my house and my wife's mother also lives with us since she is alone (no one to look after her except her daughter). Few weeks back there was an argument between my father and my mother due to which there was some high tensions and rift between me and my father and my wife and my father. There were some remarks made by my father against my wife's mother which my wife and I did not like. My father also made some remarks against my mother and she is also mentally suffering due to this. Since my father is old and feels unsecured he says that if my mother goes for legal separation then he will stay at my place (son's house). I know my father very well and due to his anger, hyper nature, high voice and manner-less nature I do not want to stay with him. nor I want that my wife's mother should stay in the same house now. In this respect I have the below questions: Can you help to answer them? 1. How can I protect my wife and her mother from my father anger, hyper nature as there is a damage already made with my relationship? 2. How can I protect my mother from my father due to mental stress she is also undergoing? 3. Can I sue my father for mental harassment done on me and my immediate family?. 4. Can my daughter-in-law sue her in-laws (only father-in-law) for mental harassment?. If yes what will be the punishment?. Does words spoken by my father against her mother act as signs of mental harassment? 5. I heard that I cannot disown my father legally in India ,so I need to take care of him when he is old. I am ready to take that responsibility but I am afraid that due to his bad nature the relationship will still worsen between me and him and also between him and my wife and other family members. What can be done on this? 6. Do my wife also have equal share in the rights of my house (currently the house is 50% owned by me and 50% owned by my mother and my mother is supportive and is ready to transfer her share to my wife)? 7. Can I and my wife if she has equal share in my house legally go against my father not to stay in our house due to his nature and our fear of causing mental stress to others in the family? Regards