You should file an affidavit objecting to the application. You should try and counter the accusations made against you in your wife’s affidavit, and include facts and information to support your version of events. A hearing is likely to be set in court in front of the parties, and at this, you should try and discredit your  wife’s version, via cross-examination. You will also  have to withstand cross-examination by his wife/her lawyer, and should also have the opportunity to prove your case by giving testimony yourself about your version of events, and bringing supporting evidence .