Two of the housemates, Geordie dancer Anthony and bookies' favourite Makosi, ended up in a naked embrace in the pool, which lasted for so long that the other housemates thought they were having sex.
The pair have since denied that it went that far to their disbelieving fellow contestants, although Makosi was feeling guilty enough to wail: "Mummy, I'm sorry."
During the same drunken evening, Anthony also spent time snogging blonde beauty Orlaith, who has proclaimed herself to be one of Belfast's top models. His antics have seen the bookmaker Paddy Power give him odds of 5/1 to win. Makosi is at joint favourite, with 7/2, along with one-time outside favourite Derek.
Orlaith also snogged Makosi, hairdresser Craig, and at one point shared a three-way kiss with Anthony and Kemal.
The action follows last week's failed bid by brunette Saskia to have viewers keep her in the Big Brother house by getting down to some undercover action with Maxwell. She was booted from the show on Friday evening, to the sound of booing from the audience at the Big Brother house in Elstree.
Ten housemates remain in 'Big Brother', which is not yet half way through its extended run of 100 days.
This week they have been given a summer holiday task in their attempt to win a luxury food budget. It will see Orlaith, Vanessa and Makosi playing holiday reps, while the remaining seven housemates are holiday guests. The reps must cook and clean for the guests, run activities and lead them in a conga line whenever conga music is played into the house.
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