Huge fraud and domestic violence

For the past one and half year my father is having a secret unlegal relationship with a divorced woman in this city. He has been out of any source of income for the past 10 years or more. He is creating a super ill condition with me and my mother for all this time and even threatning her that at this age(54) he will divorce her and putting several unwanted conditions to both of us. We both have tried talking to him to leave the other woman and come back to our family but that has often lead to quarrels and physical fights. He has also fought with my mother physically multiple times over this issue. And also with me recently. And in my self defence i acted in a way which has led to his own injury. But he was the one who started all this just over a topic on dinner menu. Im just a 25 year old guy who had enough of all these and from the Last incident my father has filed a complaint yesterday in the local police station that i have been the one who has been torturing him. He has been always under the influence of the divorced woman and now things have gone too far. He doesnt do anything to earn. Doesnt take responsiblity of his family plus always tries to create a home violence and he is in a relationship without anyones concent and recently he is threatning in every way possible. We are mentally depressed over this issue and need serious help. Because he is doing all these with the help of that divorced woman who claims that she has a huge police source on her back and therefore has complained a diary on me showing his own injury which he got by attacking me physically on the first place. I need help and justice from this evil deed. Because i know that i never started a fight on my own. Please