Never a wise move to trust a king if you're someone the royal family could have an interest in. The prince's crush on her and her powers aside, her rebirth is a huge deal. Just one year of foreknowledge could shake the world in the hands of someone with power, like you know, a king. Not sure why she's revealing it without taking precautions. She should worry about rhs king making her engaged to the prince again to keep her within the royal family's hands. I wouldn't be so trusting that the king would be decent, understand her trauma and give her kingdom. (If he does, then he's a golden one, not sure why didn't stop FL's unjust execution in the past life.)