His to Dominate — Christa Wick

Book 1 (of 3) in the Smoke & Curves series (also available as the Undeniably His collection)

Plus-size secretary Mia James doesn't consider her resume's omission of the last two years of undergrad and her master's degree a lie. It's more like a failure to elaborate.
Too bad her billionaire boss disagrees.
Ex-Army interrogator and Chief Executive Bad Ass of a private military company, Collin Stark needs to know his new junior secretary isn't spying on Stark International. Trust the wrong woman with his heart and someone could wind up dead.
To convince Collin she's only guilty of being overqualified and desperate, Mia must consent to a private interrogation in which he will deploy all his tricks, starting with his favorite game.
Arousal Up.
Inhibition Down.