this tree has a different surname for her - not all trees are correct
Stephen Lupton Wrathall (jnr)
Married in 1833, Rawene, Northland, New Zealand, to
Marae-Hinetoto Whatarau 1815-1896 - her parents as
Parents
father - ?? Whatarau †
mother - Sophia Kotiro
if the tree is correct Marae had her 1st child at 15-16
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hope it helps

Stephen and Maraes children
M Thomas William Wrathall 1831-1896
F Ann Wrathall 1835-1875
M Henry Wrathall 1837-1921
M Henry George Wrathall 1840-1913
F Jane Wrathall 1844-1927
M Stephen John Wrathall 1846-1931
F Mary Ann Wrathall 1848-1896
F Charlotte Wrathall 1850-1941
F Maraea Kerehi Wrathall 1850-
M William Edward Wrathall 1857-1889
M William Edward Wrathall 1857-1893
M Richard Wrathall 1859-1886
M Lupton Wrathall 1859-1893
F Maria Catherine Wrathall 1861-1929
F Ellen Wrathall 1863-1881
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https://gw.geneanet.org/waihibeachsue?n=wrathall&oc=&p=stephen+lupton