Regarding queshing of False FIR logged related to 498a and 406 IPC by her

Hi, One brothers wife, logged an false FIR for 406 and 498a and mentioned my name, my fathers name, my mothers name and my brother name (husband of culprit). My brother is staying in rented house and has 5 month kid. First she complained in women cell and women cell conducted number of counselings. In all these counselings, we forced that we have no issues and please live and let us live. Everytime we said to police (lady SHO), counselor and lady (who logged complaint) and her family that we want to take her home, but she refused evertime. Now in the last counseling, she agreed to come to home after signing an Affidavit by both parties in front of police IO, DSP and panchayat. My bother requested to give 15 days in front of police and panchayat to take her back to home. Upon request police agreed and canceled the FIR due to mutual consent by both parties. Now please suggest, my brother dont want to live with her anymore as the situation is very bad as she mentioned all false statements in FIR which hearted my whole family. False complaints logged by her like: 1. Me and my father tried to do sex with her in present of my brother (her husband). 2. We asked for dowry Car cash. Can we register a defamation case against her and her family now? Can we take her back or any other alternative to get rid off? What else they can do if we do not bring her back? Now the situation is very worst and we dont want to