The Princess of Wales, who has stayed out of the public eye since surgery in January, issued the picture to thank people for their support. She released a new picture on instagram of her and the children taken by husband William, at Windsor a few days ago. Signing it with a C, she wrote, "Thank you for your kind wishes and continued support over the last two months. Wishing everyone a Happy Mother’s Day. C" The joyful picture sees her three children gathered around their mother, and George with his arms around her. #catherinemiddleton #princewilliam #katemiddleton #princelouis #princesscharlotte #princegeorge .