Sex on a Stick by Penn Halligan
About the Book:
Romany Belle and Macnair Palmer work for the same company, but they've been enemies ever since they lost important funding for a new project. The last thing they want to do is go away together on a business trip. However, what starts out as office warfare soon becomes hot, driving need and out of control passion to touch and taste, and very soon, enemies become lovers.
Romany goes from hating Mac to needing him, but now she has a new problem. How to keep their little affair out of the hands of office gossips? How can she pretend indifference when she really wants to fuck the stuffing out of Mac?