Daughter of darkness - Janet Woods

Four years after being drugged and tricked into marrying the fourteen-year-old Willow Givanchy, a suspected witch and unwanted daughter of his deadliest enemy, Gerard Lytton returns home to find his wife and family much changed. Having lost none of her fiery independence, Willow has become a well-loved member of Lytton's family. But although nobly born, she cannot belie her mother's dark reputation, and her father's dishonour. Having transformed herself from a child bride to a beautiful woman, Willow eventually falls in love with her husband but is her love deep enough, to overcome the obstacles of her parentage and reputation that threatens to tear them asunder.