In 1977 two women by the name of:
Caroline Esther Puckeridge, and
Ingrid Teresa Puckeridge
were residing together at 604/240 Pitt Street, Waterloo. Caroline's occupation was home duties, whilst Ingrid was a nurse.
By 1980 a Karen Marie Puckeridge was residing with the above two women at the same address.
Perhaps all three were daughters of Henry and Doreen.