False cases filed by wife to blackmail what can be done

Sir, I have been married almost 8 years and blessed with 2 daughters. My mother in law completely involving in my family since the day start. my wife is fighting always when I look after my father and sisters. 2 years back one small instance (I purchased cloths for my sisters worth 4000) she quarrel on me and left out from my home with kids. I and my wife build 1 house worth (60 lakhs). she occupied my house and filed a case against me 498a, Domestic violence, maintenance and she filed injection order on other properties which were built by own money. she also attacking with roudys wherever I usually go and blaming, insulting me and giving petition to their respective police station. she has lot of influence and sending few people wherever I go and trying to assassinating me. someone suggested her if I die all the property goes to her name because of that she and her mother and sisters are doing. she is sending court notices to my office and she is planning to blame at office. the police