My father age 75 is harassing my mother age 73 and me age 41

My father is staying in my house in thane. I am currently staying in other country. He is constantly harassing my mother. He constantly says bad words and keeps on quarreling with her. My mother just keeps silent and says nothing she is very depressedand tortured. My father is also getting pension of 50k but he gives sometimes money to my mother not regularly. All house bills and electricity, gas, maintenance ect are paid by me. I have asked him to stop harassing my mother or leave my house but he keeps on doing it and in turn he say he will put complaint against me and my mother as he is senior citizen. He is very active and doesn't need any help but my mother is having health issues and cant walk properly. I want my father to leave my house and we want to stay in safe environment. We don't want any pension of him. Should I do a police complaint against him but he is diabetic and had kidney issues in past so not sure if police will help me. Should my mother file divorce as well. Will this have any impact on me. I also want to take my mother with me to other country but my father says he well not allow as she is my wife and he will complaint against me. My mother doesn't want to stay with him anymore. Can law help me on this?