Katie spoke out about her ex-husband's new wife on Loose Women today, saying that she couldn't ask for a better step-mother to their children, Junior and Princess.
Following their divorce in 2009, Katie and Peter's relationship was anything but amicable and the pair resorted to communicating through solicitors.
However, all is rosy now - and it seems it is thanks to Emily.
When asked how she felt when Junior and Princess were introduced to Emily, Katie was quick to sing her praises to her fellow Loose Women panelists.
She said: "With Emily, I think she's really nice. I'm actually glad he's with someone like her. She's a proper lady, she speaks really well, it seems she's come from a lovely family and the kids love her and never say a bad word about her.
"I'd rather he was with someone like her than some gobby person like me!"
Katie added: "I have to thank her, because the situation now is that we're all talking. I think it made a difference, him having a woman in his life.
"We now all get on, as Kieran [Hayler] has always been nice to Pete and the kids prefer it."
Gosh, there really was a time when we thought you'd be joking if you told us they all got on!
Katie married Peter in 2005 after meeting him on I'm A Celebrity...Get Me Out Of Here!. However, their relationship came to a surprise and bitter end in 2009.
Peter and Emily, who have a daughter together called Amelia, tied-the-knot last year. Katie married Kieran - her third husband - in 2013.