As the pair washed up in the kitchen, the ex-mole noted that housemates only had around 36 hours left in the compound before their return to the outside world.
"There's no second chances, no saves, we're all going," he said. "I'm quite excited about it."
Mario then turned to David and said: "Well, your daughter asked you not to be voted out in the first week and you've made it all the way to the final day."
"What are the chances of that?" replied David, who has survived the public vote five times. "All those people that came through those doors would have loved to make it to the final day, and I've made it."
"I'm not surprised you've made it to the finals 'cos I said to you weeks ago once people got you they’d love you," Mario said, adding: "It's a shame they didn't have the chance to get Sunshine."
Talk of ex-housemates prompted David to admit: "I don't know if I'm more surprised that I'm in the final week or that some of the people I thought would be in the final week aren't here. You know, like Nathan, Ben, Shabby."
While showering together later, the minister again brought up the topic of tomorrow's big send-off and confessed his concern that the finalists could still receive a negative reaction from the crowd.
"Everyone will get some boos," Mario replied. "Overall majority-wise, we should receive a good reception.
"You're not going to be everybody's favourite so you're not going to get cheers out of everyone, but there's no way any of us will have a Govan or a John James reception. People just wanna boo who they wanna boo."