'Big Brother's Marco Pierre White Jr and Laura Carter have stripped naked for a passionate romp in the hot tub.

Marco Pierre White Jr

Marco Pierre White Jr

The 21-year-old model - who has a fiancée on the outside - vowed to just be "friends" with the redhead after they had sex last week but it seems they can't keep their hands off one another as just days later they've fallen back in to each other's arms.

The excitable pair were caught on camera engaging in a steamy tryst as they locked lips before writhing against each other on the side of the pool.

After peeling their clothes off and soaking their skin in the outside water, the duo ran through the infamous abode to the bathroom.

Parading their assets in front of the cameras, the pair seemed unfazed by onlookers as they pulled each other in for a smooch.

It's not known how far the pair went this time, following their sex session recently, but it's believed Marco - the son of celebrity chef Marco Pierre White - will regret his actions when he's sobered up.

The wannabe star was crippled with guilt earlier this week when he remembered his fiancée Kim Melville-Smith probably witnessed him getting hot and sweaty with Laura, 30, in bed.

He said: "I just need a moment to process what's happened. My family is going to kill me, my fiancée is going to kill me."

He justified his actions at the time by claiming he and Kim had agreed prior to him entering the house that they were in an "open relationship."

However, Kim - who got engaged to Marco just weeks ago - has denied she gave him permission to get with someone else behind her back and claims he was merely given a "hall pass."

Taking to her Twitter account shortly after the pair's tryst aired earlier this week, Kim said: "Fyi I said #hallpass NOT open relationship. I don't watch bb, but I heard this today. Worst thing I can't even talk to him #bbuk #bbmarco (sic)."