Cutting to a shot of Leigh and Kristie, Josh and Brandon are overheard saying: 'I don't think it's fair.'
'I think it's bloody cheating to be honest,' the chippy brothers add.
Cut to Chiara and David who claim they are 'so angry', while Leigh and Kristy laugh with excitement.
Kristy tells: 'We didn't come here to be friends...', with Kym and Michelle adding: 'When presented with that prize money, people change.'
The explosive episode of House Rules airs tonight on Channel Seven at 7:30pm.