Dirty Arrogant Boss by Terri E. Laine

Needing an escape from my million and one problems, my bestie and I end up at the party of the year.
What’s better is the sexy guy I ended up with that night.
Except there’s a gigantic problem.
Said sexy guy is my best friend’s boss and she despises him, to put it mildly.
Not only that, he offers me something I can’t refuse.
But now he’s bossing me around, trying to control my every move.
This arrangement of ours may be a huge mistake.
Until my worst fear is confirmed.
Now I may not have a choice but to be his forever.