Katie responded to reports that her daughter was only two weeks early, disregarding claims that her daughter was premature.
She wrote: “Anything weeks before 37 weeks is regarded premature so who ever said she is 2 weeks early obviously no s**t.”
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Trolls started to blast her, writing to the star that they ‘felt sorry for your children’ before typing: “You are a mother and you speak like that? You really are disgusting.”
Not one to take things lying down, Katie wrote back: “Wind your beak in ! It's people like you that cause Shit because you know shit.”
As her fans offered their support in the gathering Twitter storm, she tweeted: “Thankyou what have I done wrong to deserve abuse when I haven't done anything wrong why should I justify.”
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Katie gave birth to her fifth child- a daughter- last week.
Cheating husband Kieran Hayler was present at the birth, and it was soon revealed that the 36-year-old had decided to take back her adulterous other half.
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Writing in her weekly magazine column, Katie said: "Kieran has been by my side constantly and has been amazing support."
Do you think Katie was right to stand up for herself on Twitter?