You are not gonna like anything I have to say....
1. Super - yep.
Based on the info provided, she is entitled to 60/70% of everything.
Next - asset division is done at the time of settlement, not at the time of separation or divorce That means if he leaves sorting it for another 3 years - anything he accumulates in that time will be part of the pool. Potentially any debt she accrues could also be factored in.
Next - make sure it is legally binding. For that to happen, both parties need independent legal advice. Lots of people have been shafted by making hand shake agreement only to be stabbed in the back.
Finally - she sounds dodgy. That can be okay but you need to be careful. Most dodgy people want it to be dodgy when it benefits them, but because they are dodgy they expect everyone else to be dodgy too and, as a result, they are manipulative and untrustworthy. For that reason, I strongly encourage you to do it all by the book.
Just out of interest, were they married or de facto?