The Highland Spy - Highland Mates, #3

Aiden McArthur's the ne'er-do-well brother of a laird. He's a fighter not a lover. Little did he realize that the one chivalrous act he'd ever committed would put him in the sights of their English enemies. He's under their thumb and has no choice but to spy on his own kind. This doesn't sit well with him, especially when he determines that he's to spy on the lovely Cora Flannigan. Cora Flannigan and her brother were orphaned at a very young age.
Luckily for the both of them, the Ramseys took them in and offered them much more than a home. They offered them a family. Little did Cora know about their clandestine activities. This wasn't an issue for her. She completely understood and supported the highland cause.