Very bad situation..........If your above mentioned facts are true ,then you will win the case..........follow the following procedure.
1. File the complaint before SP of district against false FIR.
2. Aply for bail for you & your relative ,whose name is mentioned in FIR.
3.Collect proof such as Details of Rape case, Certfied copy of documents ,you can get these details through RTI act.
4. File for annullment of marriage before an authority ,because they hide the facts from you & your family about the bride.