A Rebel's Desire — Aileen Adams

Some secrets are hard to keep…
Jake promised Heather MacDonald he'd keep her secret. He'd help her train to be a warrior and all she had to do was give him a kiss. He didn't promise that she wouldn't feel the stirrings of desire for this former soldier.
For Heather, a woman determined to become a warrior, Jake's promise means the difference between life and death.
Wounded at war, then the target of a malicious healer, Jake Duncan, brother of the Highland Laird, has decided he has to prove himself, over and over again. He never thought that part of his journey would involve falling for the woman from the Lowlands who wasn't as demure or as shy as he originally thought, especially not when she was wielding a dirk.