Is it permissible for a man to marry a woman with whom he committed adultery while she was married and abandoned by her husband, and then her husband divorced her and her waiting period expired?

It is permissible for fornicators who have repented to marry each other after the expiration of their respective waiting periods: the waiting period for fornication and the waiting period for divorce, provided the conditions for marriage are met.

The waiting period of the female fornicator: Its duration: Like the waiting period of a divorced woman (three menstrual cycles, or delivery if pregnant, or three months). Its start: After the last act of intercourse if there were multiple acts of intercourse; otherwise, immediately after the act of intercourse. Its overlap with the waiting period of divorce: If a divorce occurs during the waiting period for fornication, the waiting period for divorce begins, and then the remainder of the waiting period for fornication is completed.

Fornication with a married woman does not necessitate a perpetual prohibition of marriage between the two fornicators, nor does it annul her marriage to her husband. However, it is one of the gravest sins.