What is the legal position regarding a 70-year-old man and his 60-year-old wife, when his wife insists on engaging in an illicit relationship with another married man, and threatens to expose him and burn down their apartment if he divorces her, knowing that he fears for his sensitive position?

If a wife has a relationship with a foreign man and her husband is aware of it, he is not permitted to remain silent about it, as this constitutes cuckoldry (dayyūthah). Threatening the wife with exposure of the relationship or burning down the apartment does not justify the husband's silence regarding this reprehensible act.

The husband must prevent her from engaging in this relationship. If he is unable to prevent her, then he must divorce her, and divorce may be obligatory in such a case.

If the husband does not fulfill his duty, then whoever knows about this reprehensible act must forbid it, strive to prevent them from communicating, and inform those who are able to stop it.