Prisoner Cell Block H Ending

Being in the States I never got to see the end of Prisoner Cell Block H. I did get to read the summaries of the episodes so I know how it ends.

The question I have is, did Rita actually have cancer? Some sites say she faked everything to set up Joan. Others say she was dying and set Joan up anyway.

As far as I can recall, it was not really made properly clear to us (“Prisoner” being a bit fuzzy with plots at times), although it was my impression that she did have cancer.