The thesis: a strong woman is not a rude woman
Sherry Argov's book was written for women who recognize a pattern in themselves: they give everything in a relationship, erase themselves to please, and still feel that the other person loses interest. The author tries to name the problem and proposes a change of attitude.
In the original English, the title uses a harsh word to describe the woman who has self-respect and won't accept being treated any old way. The Brazilian edition softened it to powerful women. In both cases, the idea is the same: it's not about being harsh or arrogant, but about having a firm core that doesn't fall apart in the face of a partner's approval.
The author contrasts this woman with the one who lives to please, the one who says yes to everything, anticipates every desire, and loses her own center. According to the book, this behavior, which looks like generosity, ends up draining the fun out of the relationship and the strength out of the woman.
