Not sure if it's a spoiler but . . . . . . . . . . . . . . . . .
I've only read till chapter 46, but the main reason she was chosen as Queen was because she's not capable of having children. In one chapter she pretty much said it's a 'fantasy' for her to birth to an heir for the king.
Has anyone read the novel because I would love to know if she really is infertile or if she bribed the doctors or something similar.