In an interview with Australian magazine New Idea, Kate's friend Jessica Hay reveals that the Duchess may ask her mother to move in with her so she can be a nanny to the royal baby.
A professional childminder is usually brought in by the monarchy, but the magazine reports that Kate, 31, could step away from tradition by asking mum Carole, 57, to move into Kensington Palace when the new prince or princess arrives in July.
Jessica says: "Kate and William are both pretty terrified about the rest of the pregnancy after the hyperemesis.
"Carole may even move in with them when the baby's born so they don't have to rely on a nanny.
"But all in all Catherine's very happy. With so much family around her and William, they're starting to enjoy the pregnancy after such a traumatic start."
Jessica also claims that the Duchess has taken up yoga and hypnotherapy.
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