Hi nicky286 you've got a couple of matters to consider and definitely need a professional to answer your questions.
Things like:
What happens to her Australian bridging visa if she travels to a third country?
What is the view of the USA to her entering there as an Indonesian, i.e. does she need to apply for different visa and does her current status in Australia affect the application, and so on.
I suggest you see an immigration lawyer for specialist advice, the last thing you want to do is adversely affect her chances of successful Australian residency and future travel to the USA.
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