Cian (Dublin Kings 1) by L.K. Shaw

Cian Donnelly is my Da's bitter enemy. He's also the man who won me—and my virginity—in a single hand of cards.

Now, he's come to collect.

Except I'm tired of being a pawn in a game I have no wish to play. Maybe it's time to make my own rules. The only thing I have to lose is my heart.