One Night with the Dragon Lord

To save her ailing mother, Isolde agrees to wed the Dragon Lord in place of her sister, a fearsome ruler who has torn apart every bride before her. Before the wedding she claims one night of freedom with a stranger, only to find the next morning that he is the very man on the throne. Her touch is the only thing that quiets his curse, so she chooses to remain at his side and make use of his army, even though he knows her game and lets it continue. The tangle deepens when she discovers her father is the one who cast the curse, and that Vael carries the poison meant for her.