The Governess Heiress (A Year of Scandal, Book 6) by Elizabeth Beacon
Forbidden to the undercover earl!
Hiding from society, heiress Eleanor Hancourt must live as ordinary governess Nell Court to escape her family's scandals. But when the new estate manager arrives, her quiet existence is disrupted. He may be unspeakably arrogant, but he's also irresistible!
Fergus is really the Earl of Barberry, undercover to investigate his own estate. Instead, he discovers the new governess is an illicit temptation, a match that can never be! Yet when Nell's secret inheritance puts her in peril, Fergus will do whatever it takes to save her...