Was the fiancée wronged after the discovery of her lies and concealment of defects, and her desire for separation, and my refusal to succumb to the blackmail of her family and their demands after the engagement was broken?

If the girl was not wronged, but rather the wrongdoing came from her and her family by slandering your reputation, demanding what they are not entitled to, striving to divorce your wife without cause, in addition to their claim that you had intercourse with her when it did not happen, then you have the right to refuse divorcing her until she ransoms herself from you with money. The Holy Quran permits holding back the wife (from divorce) if she commits a clear indecency, making it permissible for the husband to take back some of what he gave her as a dowry if she ransoms herself with it.

In case of dispute over the occurrence of intercourse, the word of the one who denies it is accepted because he holds onto the original principle (non-existence). It is preferable not to continue this marriage if its beginning was like this, as separation now is better than separation after consummation and having children. You must strive to reconcile the rights of your wife and the rights of your mother. In matters of dispute, you must refer to the Sharia court because the judge's ruling is binding and resolves the dispute.