Gosford's Daughter
Mary Daheim

Yet every time fate throws Sorcha and Gavin together, they're cruelly torn apart. At court, she becomes a favorite of King James, who sends her to comfort his imprisoned mother in England. After Mary's execution, Sorcha returns to Scotland where she finds the capricious monarch entangled in a nest of vipers. The most vicious of all is a dazzling courtesan who wields her beauty to set the clans against each other. But ultimately not even those otherworldly powers can prevail against the will--and the love--of Gavin Napier and Gosford's daughter.
Gosford's Daughter continues the story that began with The Royal Mile. First published in 1988 under the title, Passion's Triumph.