Is it permissible to request the wife to waive all her rights in exchange for divorce, after she discovered a conversation of the husband that led to her repeated requests for divorce?

If a wife asks for divorce without any harm from her husband, he has the right to refuse divorcing her unless she forfeits part or all of her mahr (dowry) to him. It is preferable for wise people to mediate and reconcile between the spouses, as divorce is the last resort when the continuation of the marriage becomes impossible.