Is the husband obligated to pay the full deferred dower to his wife who requested a divorce after discovering his correspondence with girls, despite his repentance and apology?

If your son divorces his wife, the divorced woman is entitled to her rights, including the deferred mahr and other dues. This applies if consummation or valid seclusion has occurred. If he has not consummated the marriage or secluded with her, she is entitled to half of the stipulated mahr. If the son repents of his sin, the wife has no right to demand a divorce. If she insists, the husband may refuse to divorce her until she ransoms herself from him. We advise striving to reconcile them, and your son should be careful not to be lenient in his dealings with non-mahram (definition) women.