Quoting Monkey Nuts:" If your doing nothing wrong then why are you SO stressed and worried? They WILL investigate you. They ... [snip!] ... I don't care if this all comes out that you did "nothing" wrong.. Maybe it will stop you from bragging on the internet so much."
I'm sorry but I highly doubt they would actually investigate her. Centrelink is useless when it comes to that smurf, why do you think so many people rort it? ... because they can get away with it. (not saying she's one of them)
I reckon to have someone actually get caught it'd have to be a big amount of money for them to bother looking into a claim of fraud and/or someone would have to have a smurfload of evidence to give to them as to why they think that person is doing it.
I know your dads GF got caught but i've seen statistics somewhere of how many people they catch and it's not a lot. They would have so many people to look into they probably wouldn't actually go talk to her neighbours/friends ect.
The thought of that happening though is probably stressing her out and upsetting her heaps though which isn't nice and not something you want to worry about especially while pregnant ...