The Duelist Duchess

Cecile Tremblay lost her entire family during the French Revolution but was able to find a new life in England as a star of a traveling circus. However, her chosen one, the heir to a dukedom and a favorite of high society, Guy Darlington, rejects the feelings of the circus performer in favor of an engagement to a wealthy and noble lady.
Fate treats Guy harshly for his betrayal. The unexpected return of a cousin thought to be long dead robs him of both his title and his bride. Only Cecile can help him start over. But first, the former duke must learn something he has never done a day in his life—honest labor.