Prince William explains how he and Kate told their children about her cancerWilliam said family is the most important thing to him in a new interview. View 4 Images The prince was worried about the long-term effects of Kate's cancer on their children (Image: Karwai Tang/WireImage via Getty Images)Prince William has confessed to feeling “overwhelmed” by the health issues his family has faced over the past year or so. ‌When telling his three children about their mother’s scary diagnosis last year, he worried about the “knock on effects” of such upsetting news. ‌William was asked how Prince George, 12, Princess Charlotte, 10 and seven-year-old Prince Louis dealt with the tough news that their mother was battling cancer. “Everyone has their own coping mechanisms for these sorts of things, and children are constantly learning and adapting,” he told Eugene.