According to her mother's death notices, Phyllis was known as Irene and her husband was Henry. Unfortunately it does not list her children's names!
The West Australian, Friday 25 March 1949
WASS: On March 22, 1949, at Geraldton, Jane wife of Ebenezer John (deceased), loving mother of John (deceased), Richard, Ruby, George, William, Irene, Albert, Irwin and Greta; mother-in-law of Emily, Bert, Jean, Daisy end Harold; aged
WASS: On March 22, 1949, at Geraldton, Jane, dearly loved mother of Richard, mother-in-law of Emily, darling grandma of Edie, Ida, Chas, Andy, Faith, Beryl, Reg and Victor.
WASS: On March 22, at Geraldton, Jane, dearly loved mother of Bill, mother-in-law of Jean, loving grandma of Valma, William and Barry.
WASS: On March 22, 1949, at Geraldton, dearly loved mother of Albert, mother-in-law of Daisy, grandma of Viv, Glen and Robin.
WASS: At Geraldton, on March 22, 1949, darling mother of Irene, mother-in-law of Henry, darling grandma of the family.
WASS: On March 22, 1949, at Geraldton. In loving memory of our darling mother.
Inserted by George and Irwin.
WASS: At Geraldton, on March 22, 1949, Jane, devoted mother of Greta, mother-in-law of Harold, darling grandma of Lesley, Joan and Trevor.
Aha a memorial notice Irene placed for her parents shows her as being of Tailem Bend, South Australia. So I think you need to look at records there.
Hope this helps.