Found in the Winter's Charms novella collection.
When the winter holidays require a visit to his family estate, Giles and Kate make the best of it. Fortunately, they stumble into a mystery along the way, inspiring Kate to take a new approach in dealing with his family's disapproval of just about everything.
Country Manners follows the story of Giles and Kate's romance after Wards of the Roses. It takes place in December 1921, between their engagement and wedding.