A husband wanted to take a second wife, so his wife asked him for khul' (divorce at the wife's request for compensation), citing the story of the wife of Thabit ibn Qays. What is the answer?

Question:
Honorable Shaykh, may Allah grant you success. He says: A husband wanted to take a second wife and informed his wife, so she asked him for khul' or divorce immediately, citing the hadith of the wife of Thabit ibn Qays. However, I fear disbelief in Islam. Is she permitted to ask for that?

Answer:
She hates him. She hates him because Thabit ibn Qays ibn Shamma (may Allah be pleased with him) was ugly; she could not bear to look at him. He was ugly (may Allah be pleased with him). So she said, "I hate disbelief in Islam," meaning, I remain with him while my heart is not inclined toward him, so I fear that I will disobey him and enter the Fire. The Prophet (peace and blessings be upon him) then ordered him to divorce her with compensation. Yes.