I'm not sure that I can help you much
from the NSW BDM http://www.bdm.nsw.gov.au/familyHistory/searchHistoricalReco...
23661/1941 groom FRASER ERIC GEORGE bride PASCOE LORNA MAY district PETERSHAM
It may be worth getting the marriage certificate as it should have her parents' names and their occupations on it. It will also have her age and where she was born so you can keep on tracing her family back.
There is a death of a Eric George Fraser listed in 1964.
24303/1964 FRASER ERIC GEORGE father ALBERT COOPER mother ALICE MAUDE district BALMAIN
I'm not sure if this is the right one that was married to Lorna. It might be worth trying to find a funeral notice to check to see if the names of his children are listed.
I hope this helps