What is the ruling on a wife who betrays her husband by communicating and chatting with a strange man and fabricating lies about him, and what is the ruling on the husband's family who know of her betrayal and conceal it?

The woman's communication and relationship with a foreign man is a sin, an act of disobedience, a betrayal of her husband, and a defilement of her honor. She must therefore repent and cease from it. Whoever becomes aware of her unlawful relationship must advise her. If she does not desist, then he must inform her husband to cut off this relationship, which could lead to indecency. Her problems with her husband should be resolved through legitimate Islamic means, not by complaining to lovers.