Marital issues

I got married on 28th May 2021.My husband and in laws acted so well and good for first 1month then they started torturing me for my salary.My husband brothers wife is too close to my husband that she feeds him food and they both roam during night times I asked my husband to stop all such behavior his brother says there is nothing wrong it’s our wish..my consister is actually playing drama between me and my husband we need to get separated so her only son can enjoy the assets of my father in law..I have tolerated so much last month infront of elders there was no change and my in-laws are torturing for pregnancy and salary what ever whole family says my husband will listen to them..infront of elders I have taken my husbands mobile I had a doubt on him I have seen all the google photos then I realized that he is having a girl friend maintaining illegal affair..I went to police station there they suggested me to sign MOU with out thinking anything I was in much depression signed MOU not even expecting a single coin..but then I realized I did a big mistake neither he didn’t get any punishment too..please suggest me what should I do so my husband will come back to me so I can still try to be with him and now he says you have already signed MOU I want a divorce.. If I can give a complaint against him and in laws what sections comes under do I can involve my husbands lover also My in-laws knows about illegal affair he actually bought her to home and made so many functions and parties together she stayed for many years as I have seen photos in mobile..My husband is not interested and my cosister is still playing game with my life suggest me