Speaking on her new show on Fubar radio this morning, Katie told co-presenter Mark Dolan that husband Kieran Hayler had been sleeping with 'another woman' as well as her long-term best friend.
Katie has been chatting candidly about her former pal, referring to her as a 'baggy fanny,' a 'sl**' and a wh***' for hooking up with stripper husband Kieran over a ten month period.
She branded the pair 'disgusting' and 'cruel' for what they had done to the pregnant mum-of-four.
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The former glamour model has opened up about everything from Kieran's affair to her past relationships, and also discussed her plans for the future.
With her co-star asking why Katie doesn't go for a billionaire, who wouldn't be interested in her money, Katie replied that businessmen are usually too private to get involved with her - as she is famous for playing out her life in the public eye.
Katie also discussed her past marriages to Alex Reid and Peter Andre, stating that Pete is 'not a nice person' and that the pair do not have a good relationship - despite having two children together.
Alex Reid however came off slightly better, with Katie saying he's not a bad person, 'he's just obviously got issues.'
On May 7 Katie revealed via Twitter that she would be divorcing Kieran, outing his affair with her best friend Jane Pountney.