The mother-of-five celebrated her vows with Kieran at a ceremony last month, just two years after they tied the knot on a Bahamas beach after a whirlwind romance.
Katie told Australia's The Morning Show that the vow renewal was for Kieran, as he was the one who had broken his vows and promises by sleeping with other women behind her back.
She said: "Because he was a naughty boy, to move on we had to do our wedding vows. It was mainly for him, really, to commit to me. I didn't break my vows. He did.
"It was a really special day and I'm glad we did it. It was an evening thing, actually, not a day thing and it was perfect, really good."
Katie, 36, was left heartbroken last May when she discovered Kieran had been cheating on her with her best friend.
It was an especially big blow as just days before the news broke she had discovered she was pregnant with the couple's second child, Bunny, who was born in August. Son Jett was born in 2013.
Katie initially vowed to divorce Kieran, saying: "I am appalled that someone I loved, trusted and believed in has behaved in this way. If he had so little respect for our relationship I would have hoped he would have thought about our child or the one that we have on the way.
"That he did not means he will no longer be part of my life. I will do all I can to ensure he maintains a relationship with his children should he want that."
However, she later did a U-Turn and took Kieran back - though warned if he cheated again she would leave.
"Kieran has done something about it and goes to therapy and has changed and is sorry," she wrote on Twitter. "Trust me, Kieran hasn't had it easy either. He regrets everything. When my new book comes out and you know the whole situation you will be gob smacked."
Katie Price: All you need to know in less than two minutes!
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