Is it improper for a woman to insist on being the only wife?

Qur'an 4:3 makes Islamically permissible men having more than one wife. However, after some (comically unsuccessful) attempts at finding a husband, I can say the idea of my (inshallah) future husband having a second wife feels degrading to me. My dream of finding a loving husband does not involve negotiations of a second wife. I'm at a point where I feel I should insist on being the only wife. **Question**: Is it improper for a woman to insist on being the only wife? Obviously, a husband may choose to have just one wife, and (as far as know) this is the norm in Muslim society. But I'm wondering if it's improper (as in haram, disliked, etc.) for a woman to obstruct her (current or future) husband from finding a second wife. I'm not clear on this, maybe this is a perfectly acceptable decision that a woman may make.