Prince Charles, son's wife share interests LONDON, April 27 (UPI) -- Prince Charles of Britain and his daughter-in-law enjoy incognito trips to the opera and art galleries, staffers say. The Duke and Duchess of Cambridge, also known as Prince William and the former Kate Middleton, celebrate their first anniversary Sunday. Members of the royal household told CNN for a documentary the duchess has made a good adjustment to life in the royal fishbowl, The Daily Telegraph reported. The duchess recently gave her first speech at a children's hospice in Ipswich. Her husband, who was deployed to the Falklands, gave her some long-distance coaching. "For her, the public engagements are a joy," one insider said. She enjoys it. Not much fazes her. She is confident enough to handle it. She is strong-willed. She knows her mind. She is professional. Staffers said the duchess has built strong relationships with her in-laws, including Queen Elizabeth II. But they said she is especially close to Prince Charles, because they have strong interests in common. "She and the prince spend a lot of time together," one said. They go on visits to the opera and art galleries; they share passions that neither of the princes share. They get on very well.