A Devil in Scotland by Suzanne Enoch

The dawning of desire
1806, Scotland. Wild, reckless Callum MacCreath is in no hurry to become someone’s husband. But when his responsible, steady older brother Ian announces his engagement to their childhood friend Rebecca, Callum makes a startling discovery: he wants the lovely young lass for himself. But it’s too late, and when Ian banishes him for his duplicity, Callum is only too happy to leave Scotland forever.

…is delicious and dangerous
1816: Marrying Ian was the practical, logical thing for Becca to do. But once Callum sailed away to America, she missed his rakish charm and lust for life. Now Becca is a widow when a much-changed Callum returns to his Scottish homeland. Will he remember their spirited, fiery connection or does he blame her for his brother’s unexpected death? This time neither of them can deny their scorching attraction. But will their hearts be burned in the blazing heat of scandal?