498A case after 3 years of separation when already DV case going on from 3 years

I am from Mumbai and my wife from Ahmedabad. My wife left me after only 5 months of marriage. She used to have love chats with her boyfriend which I came to know and then she left me. After leaving me she filed Maintenence case u/s 125 and false Domestic Violence case on me and my family in 2016. These cases are going on in family court and metro court respectively. We are separated from more than 3 years now. Now suddenly I got call from police that my wife has now in August 2019 filed 498a complaint. My question is 1. How can she complain 498a after 3 years of separation? 2. When already DV case going on and I am contesting it in Ahmedabad from 3 years which is at her cross-exam stage, how can she file 498A case? 3 How can she file 498a police complaint in Ahmedabad , when I and my family are from Mumbai? 4 Can I transfer the 498A to Mumbai as my parents are old and sister cannot travel to Ahmedabad? 5 I have not filed divorce yet, I have had enought of her harrassment, should I file for divorce now? 6 Can my mother and sister file DV case on her as they are tired of harassment from 3 years?