Crown Prince, Pregnant Bride (Harlequin Romance Series #4438)

A royal surprise! 

One look into the stranger's dark, mysterious eyes and Indigo Moran knows she's made a mistake in taking his picture. But who does he think he is? A prince? That night Indigo discovers that's exactly who he is: Crown Prince Lorenzo Torelli of Melvante. 

To Lorenzo, duty lies with his country—he can't offer Indigo forever. The trouble is…once he's kissed her, one unforgettable night will never be enough. And now Indigo's little secret is about to turn his carefully ordered world upside down!