One Night to Remember - Wicked Dukes Club, #5

Notorious whip Giles Langford is surprised to learn his blacksmith is a girl, shocked to realize she's the out-of-his-league sister of a duke, and horrified to discover he's fallen in love with the impossible-to-tame woman anyway. With no money and no title, Giles has nothing to offer but his heart... Felicity Sutton knows poverty firsthand, and she's never going back. She might miss the old smithy, but not the relentless desperation of no home and an empty belly.
Of course she'll accept the stability of a wealthy ton suitor. As for the penniless daredevil she loves, well... They can share one night to remember.