Section 498a

My brother's wife has filed an FIR against 7 of our family members under section 498a. She kept on cheating my brother(her husband) and when she got caught talking over phone call to the guy she had extra relation with, she completely denied having one, and when her parents were told about the incident they didn't give proper responses and imposed allegations upon us of harassing her instead. We sent her to her parents'. After that the person who made us meet the family and was the middle man between the two families started negotiating, but he kept on trying to convince us taking 'her' back instead of addressing the issue. A meeting was organized at his place where he had talks with both the families. He just allowed my brother to meet his in laws, and after a long talk he showed some evidences about her extra marital affair, his wife locked her up in the bathroom and attempted suicide. She was taken to govt hospital and remained admitted for 5 further days, her condition was not that bad to take even 4 hrs of hospital services. What can we do now ? My brother and my family are inncoents and were very generous with the girl for this 1 year of their marriage. What the worst can be faced by us ?