After the sacked Wallabies star claimed that sin is to blame for the bushfires engulfing New South Wales, Labour MP for the East Coast electorate Ms Allan fired back in Folau's direction.
Taking to Twitter, Ms Allan - who is openly gay - pointed out that she comes from a similar religious background.
"I grew up in a Pentecostal church and listened to stuff like this growing up," she wrote.
"Even though I knew it didn't sound right, there was always this internal voice wondering whether it might be.
"Twenty years on - I have concluded that smack talk like this is just that. SMACK TALK.
"Love who you want to, be kind to yourself and others and don't be a dick. Basic principles to live by.
"Don't be like Folau."