Prosecute wife for submitting forged document as evidence in court

My wife filed false 498a,406 case and also a DV case under section 12 of the DV Act. She submitted some documents as evidence to the court in these cases. I was suspicious about one document which was a letter she claimed to have submitted to the police as a complaint against me. In response to a RTI application filed with the police, the police denied any such complaint letter received from my wife. So basically that document (letter) appears to be a forged and false document. Now the court has passed interim maintenance order and in that order the court has specifically mentioned that the suspicious document is taken on record while passing the interim maintenance order. My question is - how can i complain to the court about the false and forged letter which my wife submitted as evidence? Under which sections, can I prosecute her ? Is it possible for the court to cancel award of interim maintenance since the one the documents in the list of evidences is a false and forged one