OMG, how stressful for her. I am glad she has you to talk to about it.

But does she have to see an OB at all? Is she high risk?
If she goes public it may not be through a special midwife program, but they have to take her and she would likely be seeing the midwives for most of the appointments (unless there is a problem, or unless the Darwin public hospital system is radically different to Sydney's...)
This is what I was thinking - if she goes public he would be her OB if there are complications only. If she has a normal pregnancy and labour she wouldn't see him at all. Her appointments would be with middies and they would catch her baby. She may have one appointment with him at 36 weeks since many hospitals do an OB appointment then regardless, but that would be it.

And if she did end up with him at her birth at least she wouldn't have to pay him