Trouble stirring Luke
Luke told Belinda to watch out for Kat. The politics student wasted no time in telling the new housemate about the group's suspicions that bubbly Kat was playing a game.
But drama nut Belinda - whose two children are home schooled - said Kat seemed very sweet and childlike.
Luke - who has been criticised for stirring up trouble in the house - went on to explain there were some housemates who were there for the experience and some who had other motives.
Meanwhile, Rex told Muslim model Maysoon she shouldn't bother talking to "reserved Rachel" if she was after an opinion.
He also told the stunner, along with Australian Sara, not to expect to get drunk in the house because Big Brother never provides enough alcohol.
Motor-mouth Rebecca warned Sara to hide her cigarettes if she didn't want greedy Mohamed to steal them when she wasn't looking.
The three new housemates all moved into the luxury bedroom.
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