I think you have Hetta and Eliza in the wrong order. By date of birth Eliza born 1863 is the fifth daughter.
Correct as per NSWBDM:
332/1842 V1842332 26 ROBBIES Elizabeth M m. 121/1862 HUTHNANCE Jamie Steven d. 14878/1909 HUTHNANCE Elizabeth M
Death notice, last column:
http://nla.gov.au/nla.news-article165735224Obit, 3rd column:
http://nla.gov.au/nla.news-article155407495297/1844 V1844297 28 ROBINS Adeline C m. 303/1872 RADFORD John d. 16618/1923 RADFORD Charlotte A
Funeral notice, 2nd column:
http://nla.gov.au/nla.news-article280769831326/1848 V18481326 55 ROBINS Sophia m. 300/1865 SIPE Robert D d. 16989/1932 SIPPE Sophia
Funeral notice, 3rd column:
http://nla.gov.au/nla.news-article16937338Rookwood METHODIST OLD 2C OC_ZONE A/#/152
SIPPE Sophie 12 Dec 1932 aged 86
SIPPE Robert Dixon 20 April 1925 aged 86
2418/1850 V18502418 55 ROBENS Stephen d. 842/1853 V1853842 110 ROBINS Stephen
2847/1858 ROBENS Hetta R m. 30/1879 SHORT William S d. 2493/1917 SHORT Hetty R
Obit:
http://nla.gov.au/nla.news-article1554320653110/1862 Stephen W (father as Stephens) m. 3115/1884 O’Neil Kate d. 2465/1946
Rookwood METHODIST NEW 4C_ZONE F/#/166
ROBENS Stephen Wesley buried 24 Dec 1954 aged 84
1735/
1863 V18631735 56 ROBINS Eliza M A m. 891/1873 MARR William George d. 16943/1921 MARR Eliza M A
Marriage notice, 2nd column:
http://nla.gov.au/nla.news-article13324096Death notice, 3rd column:
http://nla.gov.au/nla.news-article234930746Rookwood METHODIST OLD 2C OC_ZONE A/#/153
MARR Eliza M A 1 Nov 1921 aged 68
METHODIST OLD 2C OC_ZONE A/#/155
MARR William George 6 Feb 1918 aged 74
HAMER Mary Ann 22 Nov 1963 aged 83 (this is their daughter)
3089/1865 V18653089 56 ROBENS Martha J m. 665/1881 CALDWELL John (he died 1886 and is buried Rookwood with daughter Daisy)
Marriage notice, 1st column:
http://nla.gov.au/nla.news-article13478359Marriage 2: 7271/1910 DOUST David her death, 3704/1927
Probate notice, 4th column:
http://nla.gov.au/nla.news-article93641515Supposed to be at Rookwood, but not showing in search.
Son mentioned in Stephen’s notices:
d. 21492/1928 ROBENS Thomas m. 1673/1871 JEFFRIES Mary Rebecca Jane d. 21492/1928
Death notice, 1st column:
http://nla.gov.au/nla.news-article16509725Funeral notice, page 11:
http://nla.gov.au/nla.news-page1198576Obit, 5th column:
http://nla.gov.au/nla.news-article113536144Rookwood METHODIST NEW 4C_ZONE F/#/583
Thomas Robens
Mary Rebecca J Robens
Vera Annie Grieve
Jamjar