My Brother'a wife lodging a false DV and Dowary case

Hello everyone. I got married in 2009 and m blessed with a baby boy in 2014. as i lost my in laws before my marriage and had some family issues, so my child is taken care by my parent in a different city from where i was working. I used to visit my parents house on fortnightly basis to meet my soon, and fortunately in 2016, i got an opportunity to work in the same city where my parents reside with my son. i have rented a room in my parents neighborhood understanding the fact that a married daughter should not reside at her parents place. My elder brother who is working in an MNC in metro city got married in 2014. As my parents are in a different city so after the marriage my brother's wife stayed with them for approx 3 months. During these 3 months she had several times threaten my parents of committing suicide if they do not allow her to do things she wanted to and her parents had threatened my parents of dragging to the police if my brother did not take her with him. My parents did not share any of this with us.She came to the city, but her threats of going to police and registering a false case never ended.in 2015 she was pregnant and my brother brought her to my parents so that they could take care of her, but after few days without informing my parents she went to her parents house and never came back. when the baby was delivered her parents informed as and my brother paid all the dues of the hospital and brought her back home. she stayed there for a month and then again went to her parents place with her daughter. since 2016 till date she is staying with her parents. she along with her mother and brother visit my parents place and harass them to pay 25lac or else they will file a case against us.We are from a lower middle class family and we denied paying her the said amount and hence recently got a call that she has file a DV case against my parents and me and couple of days earlier we got a call from the police station that she has file a dowry case against my parents, my younger brother her husband and me. we got a copy of DV case thru RTI and we were stunned to read the accuses she has filed on each on of us.