Wife filed False 498 case against husband (me) when I refused to give money to father in law

Hello. its been 1.5 years and my wife has been stayed with my for only 5-6 months. She would tell exams and other reasons and used to go her parents home. I paid her college fees classes fees and other expenses. I almost spent 6 lakhs for her travelling, shopping and other expenses in 5-6 months. during these 1.5 years she used to ask for money to help her father in business. at first I tried to help by giving 50k and then 30k and so on. but this continued and felt like this is going wrong way. Now after I stopped paying she started fights against my parents. asked me to leave separately. after 1 year I shifted to another house in same city but still she used to fight and blame my parents. Now my mother is hospitalized and has undergone angioplasty as she got heart attack one day due to my wife constant quarreling. Now she has left home and blackmailing that if I don't give 30 lakh she will file domestic violence case. its been 5 months she left and she has now filed a case as women cell in nagpur. I stay in sangli city. please help what can I do