The only confirmation is from the mouths of the 2 parties involved. Unless forced to, if not adultery is not some glorious thing one would want to self-righteously stand up to admit machiam like he or she has reached the summit Mt Everest. If she is wronged, she will definitely stand up and challenge to sue anyone who dared defame her. A virtuous woman will take her reputation seriously and will not tahan false accusations on her character. Staying silence to me is confirmed liow.