Katie, who is pregnant with Kieran's second baby, opened up about her recent marriage troubles on her radio show this morning, adding that her husband is "getting help".
The former glamour model branded his actions "cruel" but maintained that she will not make any final decisions about their future until he has tried to change his ways.
Speaking on FUBAR Radio, Katie said: "Thank god for the Jeremy Kyle show, I'm such a fan. I used the lie detector on his show and [Kieran] failed it twice - that's how I found out about it."
The soon-to-be mum-of-five added: "People expect me to talk about this and that but it's a serious matter - I've got children.
"He's been with my best friend and all I can do is deal with the situation and get him help.
"If a friend was telling me what had happened to me, I'd be like, 'Get rid of him'. You have to be adult and assess the situation though.
"Was it normal? No it bloody wasn't! So he can't be that normal in the head. I can only stick by and see what happens. I have to see that he's making a difference."
Katie continued: "I've been pregnant for two years and my hormones haven't even settled from Jett, so Kieran has only know me as pregnant.
"It's absolutely no excuse for what he's done to me though - it's cruel and disgusting.
"Everyone is cross with him and he knows it. I won't forgive him or forget – it's dealing with it."
Last month, Katie shocked fans by tweeting that she was to divorce Kieran for having a seven-month affair with her best friend Jane Pountney.
Jane has since admitted the affair and said she "deeply regrets" her actions.
Meanwhile, Katie has also revealed that her second husband Alex Reid had been in touch by sending her emails.
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