You can buy copies of docs from the BDM Registery at I think $30 or get a transcription for $18. Just Google NSW BDM transcription agents . There are 3 . I use Marilyn ROWAN but......... Suggest you also get same of their marriage cert . Both docs should give reasonable info / get your monies worth .
NSW Marriage indexes only public to 1961 . This lady is in the 1962 roll under SWALES . She doesnt come up in any of Ancestrys BDMs.
She could have come from NZ and returned there or many other countries. Didnt pop out of Findmypast Uk migration indexes

Fingers crossed their marriage cert should give a clue or 2

Bye

MargM