The Bridge Kingdom by Danielle L. Jensen

A warrior princess - Lara how always known two things - that King Aren of The Bridge Kingdom is her enemy and that she must be the one to bring him to his knees.
When she's sent as his bride Lara is prepared to do whatever it takes to kill the king.
But when she lays her eyes on this man she begins to question whether he truly is a villain. As her feelings deepen for Aren she must choose which kingdom to save and which to destroy.