Ashes to Ashes by Lexi Ostrow

One stolen kiss is all it will take to burn it all to ash. Ashe found herself chained to a demon, sold to pay off her stepmother’s debt. All she wants is her freedom, and there’s nothing she won’t do to get it. Including embrace the advice from an honest-to-goodness angel. Leviathan, Prince of Envy, wants only one thing – to be the envy of every subject in every realm. He’s realized he needs a wife to do it. With the angel’s magic transforming her, Ashe has one night to steal a kiss from Leviathan if she wants her freedom. That kiss won’t come easy, and both have to decide what they’re willing to burn to ash to achieve their goals.