Wife staying separately filed for complaint against family

My brother married 2 years back, from the 1st day the wife has been behaving badly with and my parents. She also hit him thrice. And kept running back home. She got pregnant and went home and came back my brother after the delivery. She stayed for a week and her mother died, so my bro, her and the kids along with my mother went there. After 3 days, one night she behaved badly with him, hit him and abused him and asked to get out of her house. She stays with her father and brother. Now, she has given a complaint at Cuttuck (Odisha - our native place) that we are not bringing her back...its been a year. We tried for mutual but they didn't respond. We got a call from a lady officer tonight asking my bro, father and mother to go to Cuttuck from Ahmedabad and meet the officer. Please advise.