Robyn Donald 
Royal Baby Bargain [EPUB ebook] 

For three years Prince Caelan Bagaton has been searching for the woman who kidnapped his nephew. Now he has finally found her, and he is going to exact his revenge….Abby Metcalfe will do anything for the little boy she promised to protect. But Caelan has wealth and power and the child is a royal heir. To keep her promise Abby must agree to Caelan’s demands-and that means a royal marriage!