Her Dearest Sin by Gayle Wilson

Honorable, gallant, courageous–Sebastian Sinclair mirrored his notable brothers in every way, even when it came to pursuing an intense, impossible love. Surely the flame in his heart could be nothing else, for it drove him to rescue a brave and beautiful Spanish noblewoman–held prisoner to another man’s dangerous desires. and “Mi corazon, and ” she whispered. My heart…Dona Pilar tasted the sweetness of the epithet upon her lips and knew she’d named Sebastian Sinclair well. For the fearless Englishman had dared to snatch her from the grip of monstrous evil, had wed her to preserve her honor and had now become Her Dearest Sin.