The ruling on a woman stipulating at the time of marriage that her husband not marry another woman

Question:
He says: Honorable Shaykh, may Allah grant you success. This is a questioner from Europe who says: I am in the lands of the disbelievers, and it is not hidden from your honor the extent of the trial (fitnah) we are in. I wanted to get married here, but my wife stipulated upon me at the time of marriage that I not marry another woman over her. I am unable to take her with me to there. So, am I able to marry another woman?

Answer:
Yes, if she stipulated upon you that you not marry another woman, you are permitted to marry. However, she retains her option. If you do not act upon the stipulation and marry another woman over her, she has the right to demand a divorce. But she does not prevent you from marrying. It is not forbidden for you to marry. No.