Looking for further information on Susan Plutton otherwise known as Susanna Pentelow born 1844.
Living at Freemontle House Bath road Reading in 1881 and employed as a nurse dom to the household of Albertina Ogbourne who emigranted to the East Indies with her two daughters, Mabel aged 10 & Maud aged 9 sometime after 1881.
Is was thought Albertina returned back to the UK in 1901 leaving the two daughters with Susan in India.
search.fibis.org shows a marriage for Mabel A. G. Ogbourne, 1894 in Bengal (where what I presume are her parents married in 1865). She married Harry P Moulton Barrett. Maud might be the Maud Patience Ogbourne who married in London in 1907, so the girls might have also come back to the UK at some point.
Does this family appear in the 1891 UK census, or had they gone by then?
I can give you the 1871 for Susan, if you don't have it already. At that point she was at "The Summer House", Church St, Stoke Newington, a nurse to the household of James Carson.
You could look at overseas deaths and marriages to see if she's there, or at the wills of the family to see if she was remembered (particularly if she was with them for twenty years or more - she might have even continued on in the household of one of the girls once they had children of their own).
Albertina Ogbourne had two other daughters, Muriel aged 4 born London & Ethel aged 2 born Reading Berks Both found on the 1881 census.
I know already about the 1871 census Stoke Newington and Susan
Can't find this family on the 1891 census so its likely by this time all left the UK.
Its possible Susan could have looked after the children on the girls in question but there no evidence yet suggesting she came back to the UK for marriage or death although by 1891 she would have been 45 year old and perhaps past into the spinster stage.
You say Mabel married in Bengal 1894 this might take me somewhere to finding the family residence in India