Dirty Money by Stacey Kennedy

In a duet of naughty novellas, a seemingly innocent charity date auction transforms into an intense battle when two formidable corporate lawyers decide to buy each other’s assistants for a weekend of alluring temptation.

Liam Maxwell thought he could use my assistant, Aria, as a pawn in our little game. But I’m not one to shy away from a challenge. Now, it’s Mallory Beckett, Liam’s assistant and Aria’s closest friend, who belongs to me for the weekend, although she has no inkling that I won her at the charity auction.
Every penny spent on this endeavor will prove well worth it. However, as time passes, I begin to realize that Mallory has secretly longed for my affection all along. What initially began as a casual fling evolves into something deeper and more meaningful. From the very start, my primary goal was to whisk her away to annoy Liam, but I failed to consider that I might find myself utterly lost without her. The rules of the game have shifted, and she must come to understand that she is unequivocally mine.