Why Kate Middleton's latest move shocked the royals?

This is the first time in 115 years that the royal custom has been broken by Kate Middleton.

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On St. Patrick's Day, Irish Guards would traditionally receive shamrocks as a token of appreciation.

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Since their wedding in 2011, she has never missed a royal event without her husband, Prince William.

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Instead of going out, Kate stayed home with her relatives.

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