This was the post and thread her husband made, and there are several after it made by her (not him) under her account and username. She still talks about cancer and dying in the posts following the date of the death announcement made by her husband.
*Edited for typo
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P created the thread and was very much alive during the many, many pages, she then stopped posting i think for a few weeks or months, then her husband logged in and updated the main post. Others added to that same thread after his announcement. She did not post again after the update.