Claimed by Her Security Guard - Primal Regression, #5

When Samantha's pharmaceutical company is threatened, there's nothing she won't do as CEO to save it. That includes stealing a drug formula from the Spectrum Institute, and selling it as her own. She's certain that her newer formula is more effective, but she needs a test subject to confirm. Someone within her control, and loyal. She thought she'd found that with Richard, an ex-military security guard on her staff.
But his hot, hungry glances and constant insubordination are driving her to distraction, in more ways than one. When Samantha realizes the drug has unintended side effects, sending its subjects into primal frenzies, she doesn't want to believe it. She can't afford to. Then, a primal regression strikes Richard. Not only is she begging him to take her, but she learns just how intoxicating a regression can be.