Spindle of Sin by Candace Robinson

Welcome to the dark world of Grimm, where the villains are as wicked as their desires.

Aura was always destined to become the Starnight Prince’s bride following her twenty-first birthday. Now that the day has arrived, she looks forward to wedded bliss—and their first night together as husband and wife.
That is, until the savage dragon king from another court steals Aura away before the ceremony.
Hellbent on revenge, the King of Sin has been making careful plans to ruin the Starnight Prince. For years, he used lustful dalliances to battle his rage and bide his time. With Aura in his possession—the key to his vengeance—he’ll use her however he sees fit.
But whenever Aura is near, the King of Sin wants nothing more than to unlock her inner desires, make her crave his touch and long for the pleasure only he can give.
No matter the sin. No matter what is to become of her.