The 91-year-old monarch was speaking to Emily Clay, a 10-year-old student who won a bible signed by the queen for a school project.
According to the Eastern Daily Press, when the Queen asked Emily if she 'looked after' her younger sister, her mother replied 'It's the other way around.'
To which Her Majesty replied, 'It's like that with Charlotte and George.'
We wonder who will be in charge when bub no. 3 comes along!