Annulment

I got married on 6th September 2015. My wife stayed with me around 10 months in period of 1.5 years. In between she was used to visit her home for 2 to 3 months regularly. I was already divorced before marring this girl and she was also married once but what I was informed is when she made this mistake she was only 15. She stayed with that guy around 2 years and then she started leaving with her mom again because that boy got married to another girl. My wife said my family is not good with me after that and she is not much educated, she wants to be happy in life. I felt I should marry this girl she will get another life and we both will be happy together there won't be any problem. But now after having a baby boy and almost 2 years when she left my house by just giving couple of silly reasons I started inquiring about her because I am not able to understand what is going on and what she is planning in her mind. And after inquiry what I come to know is shocking. Her family is big fraud and famous prostitute family of there town. My wife got married twice I was the third. And none of her marriage ended legally. Her last marriage is not divorced. Her mom got married more than 5 time as per inquiry and results. They have lots of cases already on them of 497, 120d. They are fraud. I went to court to get details of all the cases and now I have everything to proove. They are not even kind of people with whom you can sit and talk. I just want to finish every connection with them. What I should do ?