Our Vicious Oaths by N.E. Davenport

Archprincess of the Aether Dominion Kadeesha wants nothing to do with fae politics. She is a warrior first and foremost, and believes in her greatest strength lies in leading her squadron of elite winged serpent flyers in protecting her homeland. But bound since infancy to be betrothed to the Hyperior high kind, ruler of all the dominions, she has no choice but to do what men have chosen for her.

Repulsed by the idea, she decides to spend one last night of freedom - in the arms of a dangerous stranger who takes her to sexual heights she's never experienced before... but who is only using Kadeesha to set a trap for the high king. 

For the high king and the kings of his six dominions were responsible for the decimation of the Apollyon Court, and the court's new king, Malachi, wants his pound of flesh. 

On Kadeesha's wedding day, Malachi and his special forces attack. Her father is killer, and Malachi wounds the high kind, ultimately taking Kadeesha as a hostage back to his land.

But she is no true hostage. The two form a pact: She will help lure the high king so Malachi can kill him one and for all, and he in turn will not harm Kadeesha or the Aether people. And as much as Kadeesha hates politics, she is not the queen of her folk. Fae bonds are unbreakable... and so, perhaps, is the attraction Kadeesha and Malachi feel for each other. For even as they must publicly display their connection to provoke the high king's jealousy, they struggle to resist the powerful allure between them in order to achieve their ultimate goal.