Worth the Scandal (Worth It 1) by Karen Erickson

Billionaire bachelor is intrigued by sexy innocent secretary and seduces her. But he has trust issues that come between them. Secretary has pulled herself up by her bootstraps and has made something of herself when she falls for her sexy boss.

I enjoyed this story only because I really liked Tess the secretary/PA. She had a strength and sense of self worth that you don't often see in these stories.

If you enjoy Harlequins Billionaire Babies series (with a little spice) you will love this.