Yes, I have been thinking along those lines.
However the odd thing is that (if she died) there is no death notice for her in Australian papers. Not that I can see anyway.
The marriage was announced in may papers and over a few days, so one has the impression that it was much approved of by the family. You would think if there was a youthful death, wherever it took place, there would have been a notice placed by her siblings in Australia.
Anyhow, there might be clues in certifcates as mentioned.
Sue