I am asking this question on behalf of a friend who is a mother to a 10 year-old Australian by descent boy. The boy has got his Australian passport and currently enrolled in a school in Melbourne. The mother is on visitor visa (FA, subclass 600), which only allows her to stay in Australia 3 months at a time. At the moment, both the boy and his mother have to travel back and forth between Vietnam and Australia every 3 months.
The mother is unsure of what visa she can apply in order to remain permanently in Australia to look after her child. The father doesn't want anything to do with the boy or his mother.
Many thanks in advance for your advice.