Is it wrong to make your hub promis not to have a 2nd wife?

[Muslimah]

as salam alykom

without going into details, a woman is allowed to stipulate in her marriage contracts many conditions, of them that the husband does not take a second wife or else she would be automtically divorced. She is for example allowed to stipulate that she does not leave her country in case the husband takes a job in another country, and many other conditions.