Section 500 and 114

Dear sir/mam , i want to ask a question. my mother's sister's husband always use to torture my aunt, they many times have quarrels in their house since their marriage ie. since last 17 years. two years back there was a quarrel in her family, and after that my aunt had come to our house, and told us the instance, all of my family member maked her understand to forget and start her life in new way, when she gone to her home her husband refused to accept her, this had happen many times in this 2 year. when she comes to our house her husband dont like it, and many times warned us not to support her ., we belong to a lower middle class family, her wife many time use to call and inform us about his daily behaviour even after many times my mom asked her not to call again and again as this many times severely affects my mom and dad's health as they both have high blood pressure, and also our house environment . last year my sister also had affected by this, due to negetive family environment she was fainted on the road and was hurted badly . on phone my aunt always use to ask my mother about what to do , my mother told her that what she thinks right , do that. AND NOW before 4 days my mother recieved a letter which was actually a notice send by my aunt's husband that either to pay him 5 lakhs rupees or he is going to sue my mom under section 500 and 114, for provoking my aunt for quarrel, and defaming him. dear sir madam plz guide me what to do in this matter we dont want to pull this matter for a long time, as we can't afford this . we belong to a very calm family and dont like to indulge in this type of matters, and always wish to stay far from this. plz guide ...................