Marital contract for harmony in family

My wife & I had multiple discussions on our issues while we agree to work on them, practically we did nothing. I had discussed my issues with her father as well who promised not to repeat them but has done nothing to implement it. Last month they called police to our home and made false allegations to scare / pressurize us and made us follow their demand. While the constables told them that there is no reason to fight and do not need a case. They forcefully registered a complaint against us. I am concerned about my child growth, health and future under these circumstances and feel helpless for his future. Considering the fact that we keep fighting on same issues, is it possible to sign a marital contract to lay down the rules in order to lead a peaceful life? Highlighting my issues below: 1. My in laws wants me to leave my parents and move out. They continue to provoke my wife in some form or other. Probably my wife understand that this is not possible, but due to continuous provocation from my in laws there are fights for petty or no issues at all leading to her statement that she wants us to move out of this house. 2. Significant dominance of my sister in law in our decision making. She managed to move her in laws out of her house and hence considered as role model for my wife. a. She persuaded my wife to undergo abortion of my child against my wish, despite having a hereditary problem which results in high risk or no pregnancy in females. My sister in law herself had 3 miscarriage and could not conceive 2nd child despite visiting well qualified doctors. Eldest sister in law could not conceive till date. b. She called the police last month to pressurize us and give into their demands from my parents. She played a dominant role in raising false allegations (since they cannot legally demand separation) which were proven wrong at same instance. 3. Considering the age of my son (2 years), I want to keep him away from all fights and issues but my wife drags him in middle of the fights to use him as shield or dominate me since I don’t want to shout in front of him. He is a small baby and I can see him getting scared and change in his behavior due to all these fights. I really feel helpless for my kid and want him to be kept away from all these things. 4. My in laws take my wife complete salary, at the beginning of our relationship I agreed to pay them some money but their demand keep rising and I could see that they just need money and nothing else. Now I have objected to this arrangement and since last 2 years whole of my wife salary is going to her parents. I have to take care of all house hold expenses and nil contribution from my wife. Marriage is considered as partnership. Currently she is my liability. Is there any legal arrangement which state that she should take care of her own expenses? She earns equally good salary to manager her lifestyle. (Now with police bought in this relationship, I don’t want to bear her expenses anymore)