Article continues below advertisementPrince William and Kate Middleton tease each other just like every other married couple!In Grant Harrold's upcoming book, The Royal Butler: My Remarkable Life of Royal Service, the former staffer recounted a candid conversation he had with the duo about aging while at their home in Gloucestershire.Article continues below advertisementKate Middleton Giggles Over Prince William Losing His HairSource: megaPrince William was able to laugh off Kate Middleton giggling over his 'bald patch,' a former royal butler shared in his new book.