The World Federation One Stop Fiqh

Ruling 2421

If a married woman commits adultery, then based on obligatory precaution, she becomes unlawful forever for the adulterous man. However, she does not become unlawful for her husband. In the event that she does not repent and persists in committing adultery, it is better for her husband to divorce her, although he still has to give her dowry to her.