But few could blame her for her reaction on Tuesday to a young mum who lost her baby at just three months old.

CHELSEY HARWOOD HELPS MOTHER GRIEVE FOR STILLBORN BABY

Middleton put her arms around trembling Leigh Smith, 33, whose baby daughter, Beatrice, passed away at East Anglia Children’s Hospice - of which Kate is royal patron.

Mrs Smith told the audience at the fundraising event of her horror when her newborn was rushed to hospital with a heart problem.

‘It became clear that Beatrice was dying and would be unlikely to survive long enough or be strong enough for a heart transplant. We knew out little girl was just too tired,’ she told a captivated crowd.

MOTHER CHARGED AFTER NEWBORN BABY FOUND DUMPED IN DRAIN

In the weeks after her child’s tragic death, Mrs Smith reached out to Kate via letter to praise the staff at the hospice. And she received a personal reply from the Duchess.

‘It was a lovely gesture and helped me through a terrible time,’ said Leigh, who was touched by Kate's kindness.

‘When I met her today she remember the letter and said it was an honour to meet me.'