Highland Sins by Ceci Giltenan

Gennie MacDonnell grew up surrounded by love. Even so, she doesn’t expect her marriage to be marked by all-consuming passion. She was betrothed to Aedan Munro when she was but a lass of twelve. Still, she does hope for companionship…and perhaps a bit more. But she learns quickly learns both wishes are in vain.
Aedan Munro was taught the importance of honor, duty, and respect…but never love. Unbeknownst to him, his entire life has been shaped by a tragedy that happened long before he was born. But, to his surprise, the sweet lass he marries stirs both his heart and his desire. It flies in the face of everything he’s been taught, but it makes him yearn for more…for something he believes he can’t have.
In spite of the demons of the past, will they be strong enough to listen to their hearts and claim the love of a lifetime?