The mum-of-five was spending quality time with her entire brood over the holidays, when she filmed a few cute videos of her eldest son, Harvey, playing with his younger siblings.
In the first video she posted, Katie asks Harvey if he wants to play a game where they all try to make each other laugh. Junior, Katie's son with Peter Andre, starts it off by making funny sounds that Harvey has to copy.
But when Harvey goes to imitate his mother, he surprises Katie by saying: 'Kevin, will you shut the f**k up, that dog...'
She wrote in the caption: 'Omg Harvey has done it again swore sorry to offend anyone but he does make me laugh 😂😂😂apparently that's what I say to one of my dogs called Kevin 😂😂😱'
In another video, Harvey is seen playing with little sister Bunny, who Katie had with Kieran Hayler, gently tickling her and making her laugh.
Fans couldn't help but gush about the heart warming moment between Harvey and Bunny, and praised Katie for being such a 'good mum'.
One said: 'Love how innocent he still is and how happy he is with his Brothers and Sisters 💙', while another commented 'Harvey you are such a good big brother ❤️'.
A third wrote: 'When you have a child with additional needs the bond between them and their siblings is so beautiful to watch other people don't quite understand ❤️'
A fourth fan also took to the comments section to say: 'Aww you are a beautiful mother 😍. Harvey is amazing, I always love to see your children interacting and wish i was there. Your all so lovely and so positive. Happy New Year to a beautiful family. X x x'
Another of Katie's 1.7m followers said: 'He’s amazing!! You are such a good Mum!! ❤️❤️❤️'