La falsa hermana del duque

In High Society movie, Adele was born with nothing: no last name, no family, no home. But then she meets Cesare Buonaparte. The Duke. The most feared man on their island nation. And finally, she has a chance to become something more. To bring herself out of poverty and save her friend's life, she makes a deal with the Duke: she'll help him escape an arranged marriage by pretending to be his long-lost sister. Though he's the most gorgeous, infuriating man she's ever met, siblings—even fake ones—can never fall in love. So... why does he keep looking at her like that?