While you may think that you know everything about this generation of the royal family, many people don't realize that William and Harry actually have a stepsister! Camilla Parker Bowles has a daughter named Laura Lopes. Therefore, when Camilla married Prince Charles in 2005, Laura and her brother, Tom Parker Bowles, became part of the family. So why do we never hear about her? And who is this mystery royal stepsister? Here is the truth about Laura Lopes.