See, Wife can claim maintainance under 3 provisions as below:
1. HMA : Under this law, both spouse can claim on each other...
2. CRPC: Wife can file and get maintainance. But at the same time your parents also can claim. If parents are senior citizens, then that adds up you to reduce your maintainance to your wife. IF you fail to give ordered maintanance, you may get max 1 month jail, which accumulates every month for non payment.
3. PWDVA: To claim maintainance under this act, she has to prove that you have done domestic violance. If you hav not done domestic violance, then case is closed in your favor which you can use to file divorce by cruelity for which wife wont get maintainance. If it is proved that no DV happened, then husband is behind bars and wife is in road. Wife wont get any money as maintainance.
Considering all these, Wife put case first and then take back after having amicable settlement.
So regarding maintainance nothing to be worried. Even you have choice to recover interim maintainance you paid to your wife if case goes your favour. Else again she will be behind bars, for not giving back ur interim maintainance which she took illegally.
Experts please comment if you differ from my view.