Kate Middleton goes back to work in Windsor, despite rumors that she is pregnant.

There are rumors that she is expecting her fourth child.

The news is broken to King Charles and the late Queen Elizabeth by Prince William and Kate.

Following her family's holiday, Kate has returned to her royal duties.

On October 15, she did her last job as a princess.

At Windsor Castle, she met with the head of the Royal Establishment.

William and Kate are the parents of three children.

Kate supports the Prince and Princess of Wales' Royal Foundations.

There hasn't been an official confirmation of the pregnancy rumor yet.