Most of Dexter's back story has already been pulled apart in the press, with revelations that his big casino win and champagne binge was nothing more than a publicity stunt.
His own business manager recently claimed that Dexter was broke with "no money at all", and his 'media' job involved being a paparazzi photographer.
Even has mum confessed that a lot of what he said to get into the house was "exaggeration", such as his tales of being London's highest paid male escort and "most notorious" Sugar Daddy.
"I'm not sure about the male escort bit - I think that was an exaggeration," mum Ellen says. "I think years ago someone wanted to do an article.
"If someone says: 'I'll give you £6,000 for your name and picture', you'd say yes wouldn't you? I think it was actually more like £25,000."
And Dex's mum also revealed she also wasn't sure his girlfriend was real either.
"I've not met her," she said. "He told me he liked her a lot, but it was early days - I don't think he had the time to get to know her."
Ellen added: "It's work to him. He'll look for ways to make money and will go for it - whatever it is."