Envy. Divine Deities, #6

The final book in the Divine Deities series! When you're the daughter of a god, you're not always in charge of your own fate. That's what Sasha and her five sisters discover when their father, a minor god, has bartered their future to the god of the Underworld. Their foolish father lost his kingdom to a trickster goddess, and much like any buffoon, he has thrown good money after bad and decided to trade his daughters for his kingdom.
Indeed, the girls' hands have been given in marriage to the princes of hell. Sasha's pledged to Caleb. A sweetie, by all standards, when compared to his hellish brothers. Yet, what Sasha and Caleb don't know can absolutely hurt them as palace intrigue swirls in the Underworld and threatens to consume all in a tidepool which started long before the Red River goddess committed her sin. Long before the girls' father's impetuous affairs.
Oh, these matters predate all, going back to the very beginning of evil. And now, Sasha is missing. Not merely missing. In grave danger.