Saving Sara (Masters of the Castle #3)
Maren Smith

Now, years later, Jackson is chief of security for The Castle - the hottest BDSM fantasy resort in the country. Summoned to the dungeon on a trouble call, Sara is the last person he expects to find huddled up against the bathroom wall. After three long years filled with even longer nights, he's had plenty of time to consider all he'd do if ever she fell back into his life. When he sees his chance, he doesn't hesitate. One day - that's all he has before the buses come and Sara runs again. One day to rekindle old passions, to bury old fears, to prove once and for all just what is illusion and what is not.