Kate Middleton took to X, formerly known as Twitter, to update fans on the final stages of her cancer battle on Monday, September 9. The Princess of Wales was seen in a video alongside her husband, Prince William, and their three kids, Prince George, Princess Charlotte and Prince Louis, as well as Kate’s parents, Carole and Michael Middleton. “As the summer comes to an end, I cannot tell you what a relief it is to have finally completed my chemotherapy treatment. The last nine months have been incredibly tough for us as a family,” Kate began. “Life as you know it can change in an instant and w…