His Royal Twins by Holly Rayner

Royal life is blissful, and Alyssa – the American Princess – and her dashing Prince Ali are content, especially as they await the arrival of twins into the family.
Indeed, the life of a royal is tough at times, but Alyssa thinks she’s adjusted well. That is, until when attending a prestigious party, Alyssa has a rare chance to learn a little more of Ali’s business backstory, and she doesn’t like what she hears. Could there be a few elements of Ali’s past he’s not proud of?
Before she has a real chance to ask him, however, she’s kidnapped! One of Ali’s old business partners, posing as a doctor, spirits her away into the unknown! Can she find her way out of this predicament, and back to the arms of her husband before the twins are born?? Can her ever devoted husband rescue her in time?