The mother-of-five told Fabulous magazine she was right to give Kieran a second chance after he cheated on her with best friend Jane Pountney while Katie was pregnant with their first son Jett.
Katie and Kieran's rocky history is well-documented: after his affair was exposed by Katie via Twitter, she vowed to divorce him, before doing a U-Turn, taking him back and having a second child with him, daughter Bunny.
In an interview with The Sun's Fabulous magazine, the former glamour model said she understood why others may question her decisions but she's happy she gave Kieran another chance.
"Other people think Kieran is a cheat and a liar but I don't care what they think. I'm the harshest judge and I know how much he has changed. In the past two years he's gone from boy to a man. I trust him 100 per cent."
Katie went on to say: "When he cheated on me, everyone told me to get rid of him. It would have been easy to do. But there was something in me that knew I shouldn't give up on him, and I've learnt a lesson about myself because I've never been good about second chances.
"Despite all the pain and horribleness that was going on when I found out he had cheated, I knew in my gut he was still the right man. And he's a better man for having gone through therapy and all that. I love him to bits and so do my kids."
As well as two-year-old Jett and Bunny, 15 months, model Katie is mum to sons Harvey, 13, and Junior, ten, and daughter Princess, eight, from previous relationships.
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