Kelly revealed: "I felt as if, around me at least, she would be brash and common for the sake of it. She seemed to like nothing more than saying something shocking in the hope of a reaction.
“I’ve often thought that perhaps she was in the wrong world. She has a lovely figure but with no hips or curves, so while the rest of us were trying to tone it down, she was always trying to work it up."
Adding further salt to the wound, the 34-year-old added: “After a few years of not doing brilliantly, she had the first of a number of boob jobs that have taken her from a 32B to a 32FF.”
Ouch!
The model also opened up about her troubled childhood growing up on a council estate in Kent.
Although she enjoyed many aspects of her youth, she wrote about how she would ‘dread’ the weekends when her parents would go to the pub and get involved in drunken fights.
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"My parents would spend too long in the pub, come home p***ed and eat the burnt Sunday lunch. Then there would be a fight and the police would be called. Or my dad would drive off in his truck.”
She recalls one memory in particular which always stuck with her.
"One of the worst times was when my dad came back from the pub and started throwing furniture around, while Mum and I huddled out of the way.
"My mother, Sandra, called the police and my dad, Kenneth, tried to climb out of the window to escape. He broke his leg trying to avoid them and they had to carry him down the stairs ... It was one of the most traumatic events in my childhood."
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Kelly’s autobiography is currently being serialized by a UK newspaper in preparation for its release.