Among the lesser known Royal relatives at the Queen's state funeral service was Prince William and Prince Harry's step-sister. Laura Lopes, 44, is the daughter of the new Queen Consort, Camilla, and her first husband Andrew Parker Bowles.This makes her King Charles' step-daughter and the step-sister of William and Harry.The art curator and her food writer brother Tom Parker-Bowles, 47, both made a rare appearance alongside the Royal Family at the service on Monday, as they tend to stay away from the limelight.They were both there to support Camilla as she was installed as an honorary Royal Lady of the Order of the Garter in June.