My Husband Is a Hidden Legend?!

A thousand years ago the Bellamy family scholar pulled a white serpent spirit out of trouble, then took her skin and held it as surety, binding her to a pact: every generation of his line may ask her for three things, and fate will not let her refuse. Forty-nine generations of wealth and titles pass. Then it is William Bellamy's turn, and he asks for none of that. His wish is to marry her. Ivy White lives as his wife. On the day she gives birth to their son, he has her burned alive, because what he actually wants is the core of her power, the thing that would make him deathless. He believes the timing is his. Ivy has been counting toward this same day for a thousand years, and what she does with it is already arranged.