Who gave Malala the giggles?

Returning to the subject of the famously famous Malala, I was amused that she was amused by a certain (only marginally less famous) say-it-as-you-see-it royal consort:

The Duke of Edinburgh greets Ffion Hague, Little Red Riding Hood and Mahmoud Ahmadinejad

According to Sky News:

Schoolgirl activist Malala Yousafzai was reduced to giggles by the Duke of Edinburgh who joked that parents only send children to school to get them out of the house.

The 16-year-old, who was shot in the head by the Taliban in Pakistan for encouraging girls to go to school, was attending a reception at Buckingham Palace with the Duke and the Queen.

Malala said afterwards: "He said parents are tired of children, and that's why they send them to school, and I laughed."

Despite it being a joke on Prince Philip's part, Is the BBC biased?'s royal correspondent, Sue, has been told by palace insiders that Prince Charles immediately sought out one of his favourite potted plants for a spot of emergency one-on-one counselling.