Prince William updated a royal watcher on Kate Middleton’s well-being, as the Princess of Wales focuses on her cancer battle. The Prince of Wales continues to carry out his public duties, while Kate is taking a step back from the spotlight due to her health. “Do you mind if I ask how your wife and children are?” someone asked William on Tuesday, April 30, at the new James’ Place center. “All doing well, thank you. Yes, we’re doing well,” the future king replied. Kate surprised fans in March when she updated the public on what was going on behind closed doors. “I wanted to take this opportunity…