The very first time she was asked when she had only just heard there was suspicion of deathcaps, she said one word "Woolworths".
The next time she was asked a few hours later by her BIL, she said "Woolworths and a Chinese grocer from Oakleigh".
"Anxiety panic" or guilt-filled panic, I think she was trying to muddy the waters and throw some suspicion around there.
It does seem to me that at this point she absolutely was trying to infer it was the mushrooms bought from an anonymous, untraceable grocer shop. Make it all go away.
Must've been like a nightmare game of whack-a-mole when she discovered that Public Health weren't going to let that mystery grocer shop go away!
I think this is why she used the strange wording about leaving the remaining wellington in the oven "to deal with later". She had deal with it because it was deadly.
