Poppy. Edwardian Candlelight 10

The tenth book in M. C. Beaton's charming Edwardian Candlelight series. She was the flower of an East End slum who rose to become a star. But Poppy Duveen quit the stage to marry Freddie Plummett, the only real gentleman she had ever known - the bounder who died. When Freddie died, Poppy was left the castle but also left to the clutches of Freddie's formidable uncle, Hugo, the dazzling Duke of Guildham.
How could she admit, even to herself, this dangerous attraction? Instead, Polly tried to turn her back on it but it was no use. Clearly, Hugo thought her a mere waif, a common poor relation. Well, she'd show him and his snobbish family. She'd return to the stage as Poppy Plummett, conquer London, and make fools of them all!The Edwardian Candlelight Series chronicles young, passionate girls who come to understand the nature of true love despite overwhelming odds.
From a penniless pauper, a stenographer, a governess to an accused murderess, these ladies in love overcome incredible odds with grit and sophistication to find and keep true love.