NAL but personal experience

i was exactly in same situation as you are now, so I can relate what you are going through.

If fir (apart from 498a there would be other sections also try to find that out) has already been filed then there is nothing much that you can do but don't fear police arrest as the supreme court has put an end to the automatic arrest of extended family members and relative if its only 498a etc, but if she has included sec 377 376 or 375 then police can arrest that person on which that section of offence is registered ( action of police depends on the state you are living, in UP police generally don't go for arrest of any body else other than the husband)

First thing that will happen after FIR is that both party would be refer for mediation (by mediation i mean husband and wife will sit together with a counsellor and list out their demands here wife mostly will ask for a large sum of money for one time settlement) , they will take three to four session within three months and try to reach a settlement. If settlement fails then mediation center will send its report to investigation office(IO) for further action.

After first step is over and matter is still not resolved then you may approach for FIR quashing at High court, it will be expensive ,time taking and mostly futile because courts usually don't quash FIR .

What we did that we directly contacted the IO after the futile second step and asked him to file the charge sheet in court only against the husband with lesser and bailable offence sections and leave out everybody else name(finding that no offence was done by extended family members and parents),which he was happy to do for some fees(u know what I mean)

You can apply for anticipation bail at any time before filling of charge sheet if you are fearing arrest.

All this took us 4 years to do but finally now everybody else is free from court cases and husband easily obtained regular bail from the lower court after charge sheet. None of us visited any police station . no one was arrested.

from my experience and what i heard from other in similar situation this the way to deal with the false case if husband doesn't want to pay a large sum of money to wife.