Kate Middleton had a rough time when she was pregnant with Prince George, Princess Charlotte, and Prince Louis. The Duchess of Cambridge suffered from hyperemesis gravidarum, making her three pregnancies almost unbearable.

But despite her difficulty, Prince William and Kate Middleton have always expressed that they are open to having a bigger family. With that said, the Duchess of Cambridge had been constantly rumored to be pregnant with her fourth child.

Now, a royal insider revealed that Prince William and Kate Middleton may be adding one more sibling for Prince George, Princess Charlotte and Prince Louis. Since the Duchess of Cambridge will turn 38 years old next year, and it’s difficult for most women in their late 30s to conceive, many believe that the couple is in a hurry to add one more baby to their clan.

The royal insider then shared that Kate Middleton “would love to have one more child” with Prince William. The Duke and Duchess of Cambridge always enjoy being parents to their three young children. So, having one more baby would be a pleasure for the royal couple.

“They love playing together and being creative,” the royal tipster said. “Painting, baking and building things are all activities they enjoy, and now that Louis’ a bit older, he gets involved too.”

The insider, then, shared that just like most siblings, the three young royals also have their share of sibling rivalries. “[It’s] usually over silly things like toys or what TV shows they want to watch. But most of the time they get on,” they continued, adding that Prince Louis is a “real mommy’s boy.”

Meanwhile, a royal expert previously claimed that she had two clues to prove that Kate Middleton is indeed pregnant with her fourth child. Aranzazu Santos Lopez explained that every time the Duchess of Cambridge is pregnant, she usually changes things up. She, then, pointed out that Prince William’s wife has a different hairstyle while all these pregnancy rumors were going.

“And I have another clue,” Santos Lopez added. “Kate’s agenda is locked. She will take time off, which could mean she is pregnant, considering that her previous pregnancies have been complicated.”

Prince William, Kate Middleton, and the Buckingham Palace have not addressed this matter. Just like most speculations regarding the Royal family, this has yet to be verified.