The Guardian by Margaret Mallory

After years of fighting abroad, Ian MacDonald comes home to find his clan in peril. To save his kin, he must right the wrongs from his past…and claim the bride he’s long resisted.

As a young lass, Sìleas depended on Ian to play her knight in shining armor. But when his rescue attempt compromised her virtue, Ian was forced to marry against his wishes. Five years later, Sìleas has grown from an awkward girl into an independent beauty who knows she deserves better than the reluctant husband who preferred war to his wife. Now this devilishly handsome Highlander is finally falling in love. He wants a second chance with Sìleas—and he won’t take no for an answer.