Desertion, Divorce

This is Sekhar. I am writing this on behalf of my mom. My father is working as a Senior Accountant in the Government of Odisha. It has been 35 years since they have been married. My sister is recently married. My Father began saying that he left my mother and he will not give a single pie from this month. When I asked him to give me in written he wrote that he is abandoning my mom and he gave silly reasons. 1. Me and my wife never slept in the bed room for the last 22 years. My mom never goes to his room to sleep as he drinks at home, watches porn in the room and we saw it many times even. He is saying this for 30 years since my child birth. My mom used to teach students and sell milk from cows. He is torturing my mom since 30 years. Today when I asked my father, he handed me in writing signed on 2 rupees stamps attached to that paper and asked my mom to file a divorce and even saying that due to the point 1 you will even not get any maintenance and divorce.