Prince Voronov's Virgin (Harlequin comics)

After the death of their parents, Paige is doing her best to raise her little sister. She works as the secretary for the president of a company, and she has a bit of a crush on him. She’s able to bring her sister to Russia, where she’s working, but then her sister goes missing. Paige wanders around one night, looking for her, until she is chased by a group of drunk men. A mysterious young man comes to her rescue, telling her to act as if they are lovers. She can't help but feel some attraction to him...and then she finds out who he really is. Now he's got her in his sights.