What is the ruling on a woman who has been divorced three times agreeing with a muhallil without the first husband’s knowledge?

Question:
He says: Honorable Shaykh, may Allah grant you success, if a woman agrees with a muhallil without the first husband’s knowledge, what is the ruling if this man divorces her?

Answer:
It is all the same, whether the first husband knew or did not know. If it is established that she married for the purpose of tahleel, she does not become lawful for the first husband, even if he did not know. Yes.