At Arm's Length (Heartsong Presents)

is book #358 of the Heartsong Presents line.
==Book Description==
Molly McNeil has been named personal assistant to Ken Quinlan, the future vice president of Quinlan Enterprises. Her first "official" act is to fall, knocking Ken down a stairwell and breaking his arm.
Ken is reserved and businesslike, while Molly is relaxed and open. Their backgrounds couldn't be more different. But they soon realize that opposites really do attract.
One day, Molly overhears an office rumor about their "tawdry affair" and confronts Ken. He assures Molly that such talk is nonsense, and that she deserves to be courted properly. Mind reeling, Molly wonders, Could he really mean he is interested in me?
(Description from fictiondb.com)