Easy! Get a Centrelink Payment statement online if you have my.gov account. It takes 1 minute. If you don't have my gov account search the internet and sign up. As easy as 1,2,3. Good luck!
there are countless examples of men with Thai wives including me that trusted but when the right time comes for her suddenly you find a totally different woman. I trusted my land on her name and 8 years after she refused to let me use my land etc continued then divorced even though we had a child together. What ever you do , do leave the door open for the unexpected to cover your ass.