Try to collect evidences to prove that she demanded Rs 30 lacs as one time alimony and also forcefully trying you to sign a mutual consent divorce and non compliance of her demand has resulted in filing a DV case against you. This can be audio/ video recorded by you if it has not been done earlier.
2. The above evidence or any other will be helpful to you to protect yourself in DV case.
3. No fault divorce is not granted by Court and therefore if there has been no perpetual cruelty against wife then it would be difficult for her to get a divorce by your wife.
4. If you don't wish to give divorce then contest DV case on merit.