This week, retired footballer David hit back at critics who questioned why his four-year-old daughter Harper was sucking on a dummy, also known as a pacifier in the US.
Dad-of-four David said Harper was poorly and said if people don't know all the details, they should refrain from making comments about his parenting skills.
Speaking in her weekly column for The Sun, Katie has responded to David's outburst: "Becks, you inked bundle of loveliness, you make your living out of the world watching you. You can't dictate a soft filter for the lens as well.
"As I often lecture businesses, it is not the email you send which matters, but how people feel when they read it. Therein lies the truth of your words."
Katie said that David needs to question why he is letting other people's opinion affect him.
"To that end, it is not the dummy in your daughter's face which matters, or the opinions of the sofa-sitting masses," she continued. "You have to question why you are letting their opinions upset you and own your problem."
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