• Unmarried sister living in father's house abused by sister-in-law

Respected Sir/Ma'm,
This is an open letter for all lawyers on your site..my life has become hell due to my brother's wife. A bit about my background..I am an unmarried female doctor who has shifted to my elderly disabled parents house after my father had a stroke. He is recovering and I shifted to take care of him as my elder brother refused to take care of him. My mother is also 70 plus and not in a condition to manage on her own. 
My brother had an arranged marriage 8 years back and since beginning she has manipulated my brother and tried to blackmail my parents for money, threatened suicide and false case of abuse against entire family. Sadly in India its a reality that many women misuse such well meaning legal measures to put pressure on elderly in laws. Unfortunately I have a selfish brother who does not help financially nor physically and supports his wife blindly. At this point I also want to add that my parents had invested lakhs in his education and had sent him to US for college before  his marriage but he left it midway  and returned. Only few years  back my father finally convinced him to work and got a job for him as he and his wife were living on my father's income for years. 
Today when my father is not well, he does not contribute one rupee to the household and I am supporting my parents financially. I also shifted to my father's house like I said and my brother's wife could not tolerate it. Even when I was living in another city for training, she used to spread stories about me hitting her child and other many absurd allegations.
Situation is so bad now that  few days back she instigated  my bother to force open the room where I was with my father - they both entered the room and my so called brother tried to hold my hands while his wife tried to hit me. Luckily the house staff and maid witnessed it and stopped them . My brother and wife told me to get married and leave the house- then they will look after Papa.
Everyday is ugly ...when I work in the kitchen, my bhabhi tries to bump into me and said she will throw the hot pressure cooker at me.She does this when maid is not around....she abuses my 70 year old mother verbally also but my mother keeps quiet as she wants peace.
Background about the house - it was built by my paternal grandfather and ground floor was willed to my father. There is also a common agreement between my father's relatives that ground floor is my father's share.Is this still ancestral property or is it my parents house now?
My parents have done a lot for me and no matter what I will always take care whether I get married or not. My mother wants to put the house on rent but my brother and his wife are not allowing her and they have also put double locks on their rooms and refuse to shift anywhere else. She is worried that if we leave the house ( as my brother  and his wife want) then they will occupy the entire house. Me and my mother don't have any other support and my father is bed ridden. Hope through this site some solution can be worked out.

Please guide us....thanks for your time and attention. Best Regards