What is the ruling regarding a wife who threatens to expose her husband's secrets (concerning his attempt to marry another woman) at his workplace and residence if he does not divorce her, despite her being very devout in worship and seeing the Messenger of Allah, peace and blessings be upon him, in her dreams?

A wife must guard her husband's secrets and privacy in all circumstances. Divulging his secrets is a betrayal of trust, and thus forbidden (haram). A wife threatening her husband with divorce or revealing his secrets is also forbidden (haram), especially since a woman's request for divorce without a valid reason is impermissible. She must fear Allah and fulfill her husband's great right upon her, as disobedience to him may invalidate her worship.