Attending the Royal Family's Easter service on Sunday, Prince William and Kate Middleton showed off how they have eased into their roles of Prince and Princess of Wales says Betfair Casino's body language expert Darren Stanton.The couple's relationship, and the way they interact with one another in public, has adapted over the years, with Darren arguing that recent changes show how secure they are in both their marriage and their royal roles. "Following the service, Kate was the first person to emerge from the church.