Quash the false allegation made in the complaint. You can file a petition before the High Court under section 482 of CrPC for quashing of the criminal proceeding. The court has inherent power under section 482 to take appropriate step to do justice.
Sub-section 4 of Section 125 crpc enumerates that if a wife without any reasonable cause refuses to live with her husband, she is not entitled to maintenance. The court before granting an order of maintenance must examine the fact of refusal to live with the husband.
Section 154 CrPC does not mandate that only victim can lodge the FIR. Any person can register the FIR if he knows that a cognisable offence has been committed. In Prakash Singh vs State of Punjab, the Supreme Court held that police officer could not make an inquiry about genuineness of FIR.
The Supreme Court held that sexual intercourse by taking consent on the false promise of marriage amounts to the offence of rape. As far as section 90 & 375 IPC is concerned, if the consent was taken by the misconception of fact, i.e. the false promise of marriage, it is not a valid consent and accused shall be punished for the offence of rape