Karissa Shannon told her sister that she believes favourite Gareth Thomas has not been outspoken enough.
She said: "I want to win first, I think we'll win first. If we win first I think I'll die.
"I don't think Gareth can win first for the simple reason that he's so quiet like Romeo.
"You thought Romeo would win with all the crowd cheering he got, but not that many people called in to save him.
"So if Gareth is the same way we might win before Gareth."
The twins have been similarly upbeat about surviving previous evictions, despite their lack of popularity with the Elstree studio audience.
Watch the Shannon twins discussing their Big Brother chances below: