No Accounting for Love (Club Libertine #3)
Diane Leyne

She knows all about numbers but has no idea about what it takes to make a successful BDSM club, so she takes him up on his offer to pose as his sub for a night at the club, and find out firsthand what makes it so successful.
She's shocked by how much she's attracted to the lifestyles and to Duncan, her temporary Dom. But given her track record with men, she decides that giving in to that attraction can only end badly, so she tries to keep her distance, until they are thrown together on a business trip and the passion explodes. But can it last, or will her insecurities derail them?