Does repentance apply to one who has committed usury and fornication, established an illicit relationship with a married man, and caused the destruction of his home, thus tainting her reputation, the reputation of her family, and her religion? And is it possible to help this girl understand how to manage the aforementioned relationship?

Indeed, Allah rejoices at the repentance of His servant, and He extends His hand to accept his repentance by night and by day. Allah does not cause His servants to despair of His mercy and forgives all sins for those who repent. The bad deeds of the penitent are transformed into good deeds if he fulfills the conditions of repentance. Do not tell anyone about what you have committed, and cover yourself with Allah's cover. Seek righteous companionship that will help you on the path of repentance.