Nature of the Beast by S.L. Kassidy

Tala Grayson, an introverted pharmaceutical student often let's her anxiety get the better of her. But, she has to do the unthinkable and go into a sex club to support a friend. She catches the eye of the club manager, Citlali Zhen. Citlali is outgoing, social, and confident. The two women couldn't be more different, but those differences spark something more. The sparks are interrupted when a pushy patron saunters into the club. Citlali has to keep the patron happy, but the patron asks for more than Citlali is willing to give. Tala's protectiveness is unleashed and she's forced to reveal a closely-guarded family secret to keep Citlali safe.