A daughter of Ben and Mary Roberts, “they had three sons and a daughter”, on page 16 of the biography of this daughter’s father, Ben Roberts:
“Remembered - From Ploughboy to Parliamentarian, The life and works of the Hon. Ben Roberts, Minister of Agriculture and Marketing 1943-46”.

First given name of “Ivy”, birth registered Jan/Feb/Mar 1904 at Wrexham, Denbighshire, Wales, found in August 2023. Let date of birth be “circa January 2004”.

Date and place of birth and death, place of burial, photo of headstone, from Find a Grave website found in September 2023:
https://www.findagrave.com/memorial/207484400/ivy-morris
BIRTH: 19 Nov 1903, Wales
DEATH: 12 Sep 1991 (aged 87), New Zealand
BURIAL: Archer Street Cemetery, Masterton, Masterton District, Wellington, New Zealand
PLOT: Lawn A-X, Row B, Plot 2

Year and country of marriage from search on New Zealand BDM website in October 2023:
1928/4805. Bride: Ivy, Roberts. Groom: Cyril Stanley Morris

Full date of marriage of 12 December 1928 from further searching in October 2023 on BDM Search by incrementally changing the date range for the marriage.