Kings and Bones by Juliette Cross

When Murgha’s degenerate father bets their last bit of coin and her in a high-stakes game of kings and bones, she fears she will become the property of the lecherous ambassador. But when the most fearsome dark fae she has ever seen steps into the game and wins the pot, she knows her fate is much worse. She is now owned by the enemy.
Now in the hands of a shadow fae priest with an agenda of his own, Murgha mistrusts his motives and the secrets he keeps. But she realizes quickly that her unexpected fall into the keeping of Vallon isn’t so surprising after all. The gods have plans for them both, and their new path together is just the beginning.