What should a wife do if she discovers her husband's repeated infidelity, and despite her attempts to change him, he abandons her and refuses to speak to her?

The emotional relationship between a man and a foreign woman is unlawful, and its prohibition becomes even more severe if one of the parties is married. Likewise, a wife spying on her husband is forbidden. The man must sever any unlawful relationship and commit to his wife. And the wife should be a good companion to her husband, cooperate with him in righteousness and piety, advise him with wisdom and good counsel to abandon sinful relationships, and pray for his guidance.