Divorce due to cheating and threatening to take fake case of dowry

Hello All, I got married 5 months back in an arrange marriage and living in Mumbai. In the last two months, there are several clashes happened between me and my wife. She is born and brought up in Mumbai ,and my family stays in Pune. I am working in Mumbai and now residing over there. My wife don't want to have any link with my parents and often abuse them. Her parents threaten me quite often that they will take the legal actions & file for dowry case if i don't support my wife & fulfill all her demands. My parents had some heated debates with their parents but they don't want any compromise and insisted me to have very limited terms with my parents. The fights started as we got to know that they cheated us on the occasion of our marriage as we did the same jointly for which they have all the bills on their own name. I seek recourse so that i can save my parents from being involved in the legal case if happened in the future. Also what should i do to protect myself as i have heard that contested divorce cases take very long time and lot of money is required to contest the same. I am from a middle class family and the girl family , relatives are quite rich with good contacts. I feel cheated and scared by their actions as i have a doubt that they are making a legal case against me. They are sending lot of things to my house as gifts which i suspect that they can later show in the court as dowry articles being asked for. Please suggest what should i do to protect my parents and escape from this false marriage.