There is a Wikitree profile for Mileta Amy Darcy. [[Darcey-89]]
She was born in 1920 at Coonamble, NSW and her name at birth was Maleta Amy Rutter.
Her mother Alma Maud Rutter was born in 1904 at Coonamble, NSW. She was daughter of Thomas Rutter and Amy A Ward.
There is a Wikitree profile for Alma Maud Rutter.
[[Rutter-1754]]
Alma Maud Rutter married Henry "Harry" Victor Darcey in 1925 at Coonamble, New South Wales, Australia, so he may not be the biological father of Mileta Amy Darcy.
There is a Wikitree profile for Henry "Harry" Victor Darcey.
[[Darcey-9]]
Henry "Harry" Victor Darcey (died as Harry Victor Darcy)
You write above that Alma Maud (Rutter) Darcy died in 1985. Do you know where did she died? I could not find a death record for her under Darcey or Darcy in NSW Death Index for 1985. I found a death for Alma Maud Darcy in 1987. No father recorded and mother is recorded as Ellen, which doesn't match the birth record, however death information is only as good as the knowledge of the informant.
I have linked the profile you have created for your mother, Dorren Melita Bennett, as the daughter of Melita Amy (Darcey) Bennett and Richard Joseph Bennett.
Let me know if you have any problems doing this.
Below are links to Wikitree profiles for
Mileta Amy Darcy
Henry "Harry" Victor Darcey
Alma Maud Rutter
Richard Joseph Bennett
https://www.wikitree.com/wiki/Darcey-89
https://www.wikitree.com/wiki/Darcey-90
https://www.wikitree.com/wiki/Rutter-1754
https://www.wikitree.com/wiki/Bennett-33351