Laura Wright 
Cinderella & The Playboy [EPUB ebook] 

The position: Hard-driving corporate powerhouse — and very confirmed bachelor — C. K. Tanner needs a "pretend" wife to help him convince an old-fashioned business associate that he’s a regular, reliable family man.The unwilling candidate: Abby Mc Grady, a beautiful, independent young woman who works in the mail room and detests almost everything about her arrogant, insufferable — but drop-dead-gorgeous — employer. The complication: The two of them are all wrong for each other — but they can’t keep their hands off each other, either. And the sparks flying are enough to make anybody want to turn a "temporary" partnership into the deal of a lifetime.