A lady does not smoke cheroot. She does not ride astride. She does not fence or attend duels. She does not fire a pistol, and she never gambles at a gentlemen's club.Lady Calpurnia Hartwell has always followed the rules, rules that have left her unmarried--and more than a little unsatisfied. And so she's vowed to break the rules and live the life of pleasure she's been missing.But to dance every dance, to steal a midnight kiss--to do those things, Callie will need a willing partner. Someone who knows everything about rule-breaking. Someone like Gabriel St. John, the Marquess of Ralston--charming and devastatingly handsome, his wicked reputation matched only by his sinful smile. If she's not careful, she'll break the most important rule of all--the one that says that pleasure-seekers should never fall hopelessly, desperately in love . . .