Flowers Under Ice (Regency Duo #2)
Jean Ross Ewing

He appeared as sly as a fox, daring his lovely opponent to explore temptations beyond her wildest dreams...
A rake and a scoundrel, Dominic Wyndham hungered for new sensations that could rival his adventures as a spy during the Napoleonic Wars. Opportunity arrived in the shapely form of Catriona Sinclair, a beautiful young highlander. She begged the handsome lord to return to her beloved Scotland, on a mysterious mission. And to her surprise, Dominic agreed -- one one condition: one simple game to amuse themselves on their seven-day journey. Catriona would join him in exploring the seven deadly sins, one for each day. And though she found it easy to resist many of the earthly pleasures this charming Englishman offered, there was one sin, one temptation, she couldn't deny -- the lust for passion...