Forbidden Highland Affair by Juliana Wight

There is something mystical about the forbidden that makes it unspeakably desirable.

Lady Vivien Stone never knew love. Instead, she was passed from an uncaring father to a cruel spouse like an object. Even worse, her husband can’t even bear to touch her. To him, she is incapable of arousing desire.
A Highlander, though, is about to change this…
After saving the life of a Sassenach, Kieran, Laird of the MacBride’s, is in big trouble. Despite his hatred for the English, the green-eyed woman immediately steals his heart.
However, he never expected her to be the wife of Lord Stone, the man who is pillaging his lands. And his initial attraction now becomes a shattering enmity.
Disgusted by her husband’s crimes, Vivien goes to Kieran with a proposal to offer her inside knowledge to help the Scots. She knows that he lacks allies and has a few choices, so he will accept her assistance.
While working together to undermine sinister plans, their mutual desire unlocks, and a passionate romance blooms.
But for how long can they keep their forbidden affair a secret? For if Lord Stone finds out, he will unleash chaos upon the Highlands…
She is a married woman, yet the heart knows no bounds…