The Only Hope — Jan Constant

There was much more at stake than affairs of the heart. Miss Amy Standish could hardly refuse to help young, desperate Clarissa Dysart, whose autocratic brother, Sir Hugo, intended to marry her off despite her love for a young soldier. Now, as the girl's companion, it was Amy's job to keep the girl in line. Yet Amy had taken the position for another reason. Dark and dashing Sir Hugo was guardian of Amy's nephew following the scandalous marriage of her sister and Hugo's brother -- and an equally scandalous estrangement that had cut off all contact with the child's maternal family. That won't stop clever Amy. But the one thing she wasn't prepared for was Hugo himself, a man who would be hard to keep secrets from, especially affairs of the heart.