Kate Middleton is back in action! On Sunday, August 25, the Princess of Wales, 42, was spotted making a public appearance with the royal family at the Crathie Church on Balmoral Estate in Ballater, England, amid her cancer treatment. Kate was seen attending a service at the place of worship alongside her husband, Prince William, her eldest son, Prince George, 11. The brunette beauty stepped out wearing a light brown outfit and a feather hat for the occasion, while William donned a classic navy suit. According to Daily Mail, King Charles, Queen Camilla, Prince Edward, Sophie,the Dutchess of Edi…