How to prove my mother stays in our house & getting rent

Hi all, My mother & father separated 20 years ago after my elder sister married. Me & my two elder brothers grew with the father. My elder sister married & have two sons studying in a college, my first brother married & have two kids, my second brother not married. I am 34 years old boy just 3 months back married. My father & mother divorced and after that my father is passed away. Before that my mother filed a cri.miss 125 for maintainance against to My father it went up to high Court & ordered to give 600₹ per month. My sister filed an partition case against my father & sons.now it is FDP. My mother residing at our house after separated also & getting rent up to 10000₹.after we separated we were residing at another house.my mother didn't care sons education, food,cloth etc.. Instead of caring she is torturing us from 20 years only because of we stand with father from 20 years & given statement in divorce case .recently my mother cancelled my marriage two times by telling negatively about me to the girls parents. Finally I got married with the help of friends & their families. Recently she filed an cri.miss 125 against sons, she didn't care us and we three brothers living separately & don't have proper income & struggling to lead our life.my mother said in cri.miss.125 living relative house & sons neglected.how to prove her income.in villages no agreement for rent & all. Please suggest me what Indian law says about child rights against mother. Thank you.