He Chose His Mistress. I Chose the Cursed Dragon.

Aurelia’s Bonding Ceremony is ruined when her fiancé arrives with his pregnant serpent-shifter mistress and presses her to surrender Purifying Blood for their pup. Instead of yielding, Aurelia burns the blood pact and chooses Orion, the eldest dragon prince living under a curse that could cost him his life in an Eternal Soul-Bond. When their bond awakens a seal that has tortured him for thirteen years, she cuts her palm and seals it with her blood.