He's so diddy. Makes me very broody.' The Duchess, dressed in a £1,735 Mulberry coat (left), later joined William on a visit to a childcare centre (inset).
That is when, People reports, the man took the opportunity to inquire about her and William's future plans: 'Baby number four?'
Before you picture the Duchess of Cambridge pacing back and forth in a dimly lit room, know that "broody" is British slang for hens ready to lay eggs (why does everything in England circle back to hens?) - i.e.
Kate, who is mum to Prince George, five, Princess Charlotte, three and 10-month-old Prince Louis, laughed and said: "I think William might be slightly anxious".More news: Lena Dunham defends Jordyn Woods amid cheating scandal
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The Duchess spent time chatting with other children that had waited to greet her during her walkabout.
The couple were at a party at the iconic venue, where they met young people who are making a real difference in Northern Ireland. Everyone is so courageous and strong in some of the places we go.
"Kate was very nice and William was very nice too".
It seems the Duchess' pregnant sister-in-law Meghan Markle may have struck up her broodiness. The couple is also expecting a niece or nephew soon, when Meghan Markle gives birth in the spring.
Prince Harry might have to get prepared to move down a rung on the line of succession to the British throne because it appears his sister-in-law Kate Middleton is not done having babies. Complete with a Peter Pan collar and an A-line skirt, the Duchess looked lovely (and warm!) when she stepped out in the Yukon three years ago.