A favorite with no name!

[AnimalGirl]

A book I happened to fall upon once in the library and have never seen again. I remember the plot, but the title and auther escape me (romance):
On a cruise ship, a man & woman end up being reserved the same state room as their last names are the same. It takes a bit for the mess to get figured out & in that time they get to know each other & find they run into each other or choose to spend time together as their trip progresses. Many times they get assumed as husband & wife. A sudden death at his work causes the man's time on the cruise to be cut short & the man must leave early. Knowing her name & what kind of business she runs, the man starts going throught the phone book to track her down when she develops the courage to go to his business & see him again.
Thank you for any help you're able to offer!