She then explained her mother had recently spoke with a psychic who said someone in her family would win big in the lottery and would help the rest of the family.
"I guess she was right!" the lucky winner said.
"Just yesterday my sister and I were discussing what we'd do if we won the lottery, agreeing that we'd buy each other a new car and pay off each other's mortgages.
"I suppose that's happening now!"
The woman said the "life-changing" money would be spent by helping her siblings, parents and grandparents and on a new larger home.
"Maybe I'll even get myself some nice diamond earrings, I don't know," she said.
"A holiday overseas would be great when we can do that, but for now we might just go interstate to celebrate."
Carnes Hill Newsagent owner Yiu Ho said he was "so happy" to have sold the winning ticket.
"This is certainly the biggest division one winning ticket we've sold here," he said.
The winning numbers were 5, 12, 10, 6, 2, 24 and 25, with Powerball number 20.