During Katie's FUBAR radio show today (July 22), she was asked by co-presenter Mark Dolan whether her children knew Kieran had 'been naughty'.
Katie has four children - Harvey, 12, from her relationship with Dwight Yorke, Junior, nine, and Princess, seven, with ex-husband Peter Andre, and one-year-old Jett with Kieran. She is also eight months pregnant with Kieran's baby daughter.
"This is not a publicity stunt," she added. "I haven't been able to turn to alcohol, I haven't been able to take pills. I'm heavily pregnant and I've just had to get on with it."
"In the beginning I was ready to divorce Kieran," she admitted.
"But then I read more about it and I know sex addiction is a real thing. If he hadn't slept with my mate he would have found someone else."
Katie may have been able to come to an understanding of Kieran's past behaviour, but she said she wouldn't put up with any future infidelity.
"He would be out... there is no way I would be with him," she said.
Katie also revealed she has an appointment for a Caesarean in the next few weeks, but there's a chance her baby could come before then, due to complications with an operation she had eight weeks ago.
She's been advised to take bed rest, but feels she has 'too much to do'.
What do you think? Should Katie stand by the father of two of her children or give him his marching orders?