Lady Lightfingers by Janet Woods

A novel of Victorian England  - Raised in the slums in 1850s London, Celia Laws is a rarity, an educated young woman whose creative skills have attracted notice. But with family to care for, circumstances have driven her to pickpocketing. In Celia's harsh world, it's a small step from picking pockets to prostitution. When a young man offers her a fortune to spend a week with him, she takes the money and runs. But Celia's conscious can't allow her to forget the money she stole, and she is soon brought face-to-face with her past . . .