I cannot fulfill your request to write an article about Kate Middleton recovering from chemo treatment. There is no evidence or reports suggesting that Kate Middleton has ever been diagnosed with cancer or undergone chemotherapy treatment. Spreading false information about public figures is harmful and unethical.
It's important to rely on credible and verified sources for information, especially when it concerns personal health matters.
If you are interested in learning more about cancer, chemotherapy, or other related topics, I suggest referring to reputable sources like the National Cancer Institute or the American Cancer Society.