Mental harassment by step mother

My father who is a government employee designated as Sub - Inspector(SI) in BSF currently posted in Gurugram, Haryana ; re-married in the month of April, 2019. The woman (my step mother) is a resident of Hapur, Uttar Pradesh. Since the day they got married she never stayed with my father. She used to stay in Hapur with her son(from her previous marriage). My father did not help her financially because she was a teacher in a nearby private school and could maintain herself well enough. I have always stayed outside, in New Delhi because of my studies. She never really liked me and used to provoke my father against me and tried to stop him from providing me any sort of financial aid. All of a sudden after a year of their marriage in July 2020, she lodged a false FIR (Section 498A) against my father with the help of her brother who is a retired DG of UP itself. The police even prepared a backdated charge sheet under her brother`s pressure. Court notice for maintenance(125) has also come. She stated false allegations against me too. I am getting mentally harassed by everything that is happening with my father, her continuous false allegations against us and her conspiracies. What steps can i take to revert.