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I would say it was a plane making a contrail, or a chemtrail...
... probably a plane with contrail hit by the sun?
If she saw it for more than a few seconds, it probably wasn't a meteor.
I think Singapore Airlines flight 281 is the culprit Singapore to Auckland. It passed Brisbane at 39,000 feet at about 07:50 UTC.
...the picture looks exactly like a plane with a sunlit contrail.
Oh and as others have said sunlit contrail.