Prince William teased Kate Middleton during a recent royal outing about the possibility of welcoming another child.
The Duchess of Cambridge was all smiles while cradling an onlooker's baby in her arms - but Kate's husband warned her not to get too comfortable.
When Kate returned the baby girl to her parents, William quipped: "Don't take her with you." (Watch the moment in the video above!)
The royal pair are parents to Prince George, 8, Princess Charlotte, 6, and Prince Louis, 3.
The Duchess has previously hinted at William's hesitance to have another baby. But a source previously told US Weekly that Kate would "love to have one more child."
