1. There is nothing to get unnecessary sacred of dowry cases. If FIR is registered you will get notice under section 41 A CRPC and once you get that you can apply for anticipatory bail after compliance of the notice.
2. Well, in criminal cases the burden of proof of commission of offence primarily lies on prosecution oly. So you need not prove your innocence though during trial you can cross examine the wife to bring the truth.
3. The facts of the case favours you . So do not worry and fight the case on merit and do not succumb to any blackmailing tactics.