Threats from wife his brother and father to ruin my family life send me to the jail

I am married since 2003 and have 5 years old son. I am working with a multinational company as a design development specialist in the IT department. I am the only son of my parents and I do not have siblings, I am living with my wife and son in a rented house in Gurgaon and my mother and father(retired public sector servant) live at Sonipat in their own house. For the last 5 years, my wife and I have quarrelled over small things which get settled, from the last 2 years she has started calling her father and brother and my parents to resolve the quarrel by saying that she feels insecure. Now, this has become her habit whenever I buy anything at my home or plan for a holiday with wife and son she fights with me and shouts so that neighbours will listen and then threaten me, calls his father and brother to threaten along with her. His brother also threaten me many times at my home saying that he has many political connections. After that my wife along with my son goes with their father and brother telling me that she do not want to live with me, she also took a bank ATM card with her and then withdrew money from ATM. This time samething happened to prevent the same situation I have taken her mobile phone and asked her to give me a bank ATM card and called my parents so that they can convince her to not do like this. However after 2-3hrs her mother called on my number saying her phone is switched off and wanted to know how is my daughter though she is in touch with her mother every day on phone, I told her that we are fine at home and there is no issue. Again after 1-2 hrs, his brother called me saying why my wife's phone is switched off and they are worried and if you do let him talk he will be coming to our home with police. After that again his father called me up and threatened me. The next day morning both his father and brother came to my house with police alleging that I am giving my wife mental and physical torture and I have beaten my wife, she also told police that I have beaten her and given mental torture. This kind of act by my wife, his father and brother is impacting my dignity, professional and social life. My parents are old-aged (my father is undergoing cancer treatment), and his brother and father come to my home fights with them. Further, my 5-year-old son's school is affected due to this behaviour. I am seeking your advice on how can i stop his father and brother from entering into my family matters with the help of my wife.