Cindy Graham, 49, has already knitted baby blankets for her daughter for when she has children.

Because she knows she's not going to be there.

The Sydney mother-of-four has stage four lung cancer.

And while three of her children are adults, her youngest, Charlotte, just turned eight.

"She knows I've got cancer, but she does not know my prognosis," she told 9news.com.au.

"My other children are adults and they'll be okay but my little girl, she looks at me and it crushes my heart and soul."

When Graham was given the "devastating" diagnosis five years ago, she had to stop breastfeeding Charlotte to start treatment for the cancer which kills Aussies than any other.

But she has already defied the odds by living this long.

There is just a 26 per cent chance of surviving for five years a

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