False use of 498

I have a question here. i'm from bangalore. this is with respect to my personal situation. i had a love marriage, where i knew my wife for 9 years now. She din't have any liking towards marriage, family , kids or sex from the beginning. Since i had fell in love with her i had convinced her for the marriage, and not for physical relationship or kids. All ihad thought was time will make her understand and she was immature. After marriage certain things happened as i expected, her own friends started asking about kids, so she tld she doesnt like kids. So in reply her friends had suggested her if u dont agree for physical relationship or kids he might go behind someone else. This had backfired my thoughts, where i had expected her to agree for kids, but inturn she started falsely accusing me of being womanizer. Note: No one from both families know that she din't like having physical relationship or kids. Only when she started accusing me more that i had gone behind another girl i had to break the reality to my parents, where they were shell shocked that i had not had sex or think about having sex or kids. And in the due course of time and situation my family gave back in return for falsely accusing me of having extra marital affairs by breaking the truth to their family. Which they had acknowledged. So here their family is standing strong saying what she has done is right. And at this point they are asking for marriage expense which not agreed they are planning to file a dowry harassment and all the other possible case against me and my family. Requesting for suggestion who had undergone through this or similar situations