I'm sure that every other A to Z participant has a better X idea, but this is the best I could do. Here's your vocabulary education for the day...
Xanthippe: noun; a nagging, ill-tempered woman.
Etymology: After Xanthippe the wife of Socrates who has been portrayed as a nagging, quarrelsome woman.
I'm sure that Socrates would not have achieved the success that he did without Xanthippe. Perhaps the saying should be, "Behind every successful man is a Xanthippe."