In the Arms of a Highlander by Michele Sinclair

The McTiernay brothers will always be able to depend upon Brodie Dunstan’s loyalty, his sword, and his strength. But there is another kind of bond—one that can fell even a fearless warrior . . .
Brodie Dunstan was an honored McTiernay commander when he agreed to leave and help an allied clan. Eight years later, he’s back among the McTiernays at Lochlen Castle, yet despite the welcome, Brodie feels he’s still searching for his rightful place. The moment he rescues a storm-soaked young woman on the road to Lochlen, he wonders if he’s found it . . .
From nun to killer to royal spy, Shinae Mayboill has had little choice in her life’s path so far. Now, caught in a compromising position with Brodie after her rescue, she’s ushered into a hasty marriage. To her surprise, Brodie is unlike any man she has ever met, with a tenderness that belies his powerful persona. Their passion deepens every day. But when Brodie learns the truth about her past—and the real reason she has come to Lochlen Castle—will there still be room for her in the Highlander’s heart?