cancer.An X user recently shared that the royal family sent her back a sweet reply after she mailed a letter of well wishes for the Princess of Wales, 42.Middleton went through a planned abdominal surgery in January before being diagnosed with cancer.“Back in January when we were informed our beautiful Princess of Wales had undergone surgery, I sent her a card with our (my family and I) sincerest best wishes for healing and of course an abundance of love,” the fan penned on social media on April 6.She then noted that Kensington Palace replied to her, mailing her a letter with their insignia stamped.The post went on: “Today I received this beautiful acknowledgement and I can honestly say I shall treasure this my entire life.”She joked that her husband thought at first he “was going to have to get his suit out for a garden party (silly him).”Back in January when we were informed our beautiful Princess of Wales had undergone surgery I sent her a card with our (my family and I) sincerest best wishes for healing and of course an abundance of love. Today I received this beautiful acknowledgement and I can honestly say… pic.twitter.com/iMX4WKTGyS“But he is just as blown away as I am to received this beautiful, and much treasured card.