What is the ruling on a man who has intercourse with his wife in her rear?

Question : Honorable Shaykh, this questioner says: A man has intercourse with his wife in her rear every time, then he repents, then he returns to it afterwards, and he continued in this state for a period of time. He asks if there is anything upon him for that? And what should he do? Knowing that this man forces his wife to do this by threatening her with marrying a second woman, and what should he do? We ask for the answer, may Allah grant you success.

Answer : Yes, the question did not mention that he repented. If he is persisting in this act, then Shaykh al-Islam Ibn Taymiyyah said that he should repent and turn back. Shaykh al-Islam Ibn Taymiyyah mentioned that it is obligatory to separate them while he is in this state. If we know that this man is persisting in having intercourse with the woman in her rear, then the obligatory thing is to separate them, even if she has children from him, and even if he repents and then returns to it. So we say to this man: Fear Allah and repent to your Lord. If you repent to your Lord, nothing is required of you. And if you remain in that state, then it is obligatory for the woman to demand separation, so they are separated from her husband. Yes.