Her Ladyship's Companion (The Spymaster Series)

Beautiful Melissa Rivenwood was leaving Mrs. Brody's Seminary for the Daughters of Gentlemen for a new life. But when she accepted the position as companion to the formidable Lady Dorothy, spirited Melissa could not have known that she would soon be caught up in a web of passion and intrigue at beautiful and remote Vinton Manor.

Giles Tarsin, her haughty employer, is maddeningly aloof—and irresistibly attractive. Darkly handsome Sir Adrian Hawkhurst admires her undisguisedly with, Melissa suspects, the most impure intentions. Harold Bosworth, a family connection, appears to be ever the gentleman.
But why is seven-year-old Robbie, an orphan like Melissa, so terrified?

Before long, Melissa is struggling to unravel dark family secrets that will lead her suspicions to center on just one man . . . the one man she loves!

Her Ladyship's Companion is the long-out-of-print 1983 traditional Regency Romance from Historical Romance writer Joanna Bourne