Brother's wife and in laws torturing and harassing mother and sister

My brother's wife is torturing me and my mother from last month.she gave a false complaint of domestic violence stating that my mother and I and our family beat her and tortured her from 1st day of marriage. After that she compromised to stay with my brother separately after delivery. She gave birth to a baby girl on 2nd May and did not inform my brother or my family. She gave birth in a government hospital and is hidding whether it's normal or c section delivery. Yesterday again she gave a complaint against my brother that he bet her severely and did not visit her since the birth of his daughter..In the P.S. the C. I spoke very rudely with my brother..and even my brothers wife too spoke very rudely and is demanding money and other electronic items and things of her choice to stay separately with my brother..My brothers wife is threatening me for no reason..Sir I'm 8 months pregnant and my brothers wife and his in laws are giving me mental torture and threatening me that they will harm me and my children if I stay in mother's house.Can I complaint against my brother's wife in P.S. and file a case against her.