The hounding has been absolutely appalling I agree. Especially the way others were dragged in (Rose Hanbury, and Thomas Kingston)
However I imagine they'd have had to share this anyway, as it sounds like this news means they won't be able to keep to their original plan of her being back after Easter.
According to the bbc, Kensington palace has said that William's absence from the memorial service was due to them getting the news of her cancer diagnosis, so a good few weeks after their initial statement.
It must be awful for the family (William and the children) to have her and Charles diagnosed with cancer at the same time.