Blocking my passport by wife

We both (me and my wife ) separated each other for a quite long time for almost more than 3+ years and then I moved away from India and working in abroad. Now my mom got a notification from local police station that they want to know my aadhar card, passport and other details, when we enquire further details we came to know that my wife approached social welfare department and filed a petition ( not sure what kind of petition it was) and they wants to collect all these details to submit thru embassy and passport seva office to block my passport. I doubting that she wants to apply for a divorce , so started this process. Now my doubt here is, 1 Without applying any petition in court , are they legally block my passport? 2. If yes, at what ground they can block my passport? 3. If it is blocked , is there any way to revoke before I travelling back to India? 4 what will be the benefit they will get it by blocking the passport. If they want money they can file a petition for interim maintenance or else can file for divorce .