Divorcing PIO cardholder

The initial question would be as to whether you were marrid in india and the proof of marriage would be required and you can file a mutual divorce petition but it will take atleast six and half months time and she can seek the cancellation of card or she can retain the card

I am glad that despite the uneasiness of divorce, the both you have decided to end this amicably. Divorce by Mutual Consent is the fastest way to do so. The PIO card will have to be surrendered after the divorce and she will need to leave the country unless she obtains a visa. As far as the divorce is concerned, factors such as what faith you profess and where you were married need to be considered. The two of you should speak with a family law expert who can guide you in this as it could possibly involve issues of private international law. If you have any further questions, feel free to post them here.

There is legal process in mutual consent for 12 month you can't do anything in that and your wife had PIO card, in that you do not have any benefit.
your query for mutual consent about time is clear above for 12 month in that no can do anything because its a process.