The Royal Mistake by Erin Hayes

At twenty-five years old, Catherine’s only commitment was to her job.
Until she saw those two pink lines.

Catherine has buckled down to focus on what was really important in life. Like her career. So when her ex-boss Jessica Croft offers her a job she can’t refuse, Catherine moves to Dubreva, where she’s thrust back into race car driver and billionaire prince Henry’s life.

And Henry won’t let her forget what happened between them one hot night. Even though she’s been trying to forget it.

But then she learns she’s pregnant. With Henry’s child.