Luck Is No Lady — Amy Sandas

"You should not have kissed me," she replied breathlessly.
"I do a lot of things I shouldn't. It does not mean I won't do them again."

Gently bred Emma Chadwick always assumed she'd live and die the daughter of a gentleman. But when her father's death reveals a world of staggering debt and dangerous moneylenders, she must risk her good name and put her talent for mathematics to use, taking a position as bookkeeper at London's most notorious gambling hell. Surrounded by vice and corruption on all sides, it is imperative no one discovers Emma's shameful secret or her reputation-and her life-will be ruined.

But Roderick Bentley, the hell's sinfully wealthy owner, awakens a hunger Emma cannot deny. Drawn deep into an underworld of high stakes gambling and reckless overindulgence, she soon discovers that in order to win the love of a ruthless scoundrel, she will have to play the game...and give in to the pleasure of falling from grace.