Houses 3 and 5 are in a showdown as conspiracy theories circulate on The Block

Resident larrikins Eliza and Liberty have managed to avoid conflict during their time on The Block – until this week, when the sisters are forced to stand up for themselves.After the Melbourne duo find out that Kristy and Brett are accusing them of being “Channel Nine plants”, because they supposedly get “special treatment” from Scott Cam’s builders Nine in Six, they decide enough is enough.

“People were saying we get special favours because we are kind and respectful human beings,” Liberty, 34, tells TV WEEK.

“Trades were refusing to work in House 3 because they were getting treated so badly by them. It’s incredibly frustrating when our integrity is questioned.”

When it all comes to a head, Eliza, 37, says, “it was a pivotal moment where we stand up to the bullies [Kristy and Brett].”

“I do mental health talks in schools,” Eliza shares. “I want kids watching to know it’s not OK to act like that and there needs to be consequences for that behaviour.”

This week is kitchen and laundry week, which is tough for both Houses 3 and 5 as tensions skyrocket when the girls take aim at their building team for their lack of support and impatience and Kristy and Brett tackle stumping obstacles – plus there’s the added burden of building their dining room.

Kristy and Brett claim the drama explodes because they were getting fed information that sparked their conspiracy theory, from not only Eliza herself but also a fellow Blockhead. “Gian is the one that told me the girls get work done for free,” Kristy, 34, reveals. “Everyone was happy to be backstabbing one another, but when push came to shove no-one said a word.

“Eliza also came to me and said, ‘If you just hold your bag of insulation and say, ‘this is too hard’ the Nine and Six builders will come and do it for you,'” Kristy says.

“She even said, ‘If it’s not on camera it didn’t happen,'” Brett, 34, says. “That’s when we realised Eliza was playing a game.”