The Maiden of Mayfair (Tales of London Series #1)

An orphanage in the slums of London is the only home young Sarah Matthews has ever known. But she is suddenly whisked away from poverty to live as a wealthy widow's ward in the prestigious Mayfair district of the city. Sarah can't fathom why this elderly woman, a stranger to her, would desire her company, but Dorothea Blake has reasons she isn't willing to reveal. 

As Sarah blossoms into a young woman, the secret Mrs. Blake harbours threatens to break her heart and make both of them outcasts among London's social elite. When a visitor to the Blake mansion unknowingly stumbles upon the truth, he puts Sarah at risk of losing all that has become so dear to her, including the recent attention of a handsome new curate who has captured her vulnerable heart. Will the mystery of Sarah's birth remain buried forever?