The Future King's Pregnant Mistress (Harlequin Comics‪)‬

Emily has been living with Marco Fierezza for three years. One day, she discovers that her businessman boyfriend is actually the crown prince of Niroli! Called back to Niroli, Marco, who has his own ideas for the kingdom, argues against his grandfather's focus on tourism. Old traditions get in the way of the growing feelings between Emily and Marco, and life gets even trickier when Emily discovers she's pregnant with Marco's child!.