Flora Berthold

A councilor is tricked by an impostor, whom he believes to be a baron. He gives him money and his marriageable daughter -- but then the real baron shows up and plays the chauffeur.

Theodor Fontane's novel about a young girl who as a teenager marries a stiff bureaucrat, has a love affair out of boredom and loneliness and has to suffer the consequences years later should be well known.