Prince William, 35, and Duchess Kate, 36, just welcomed their newest Prince last month. The Duchess of Cambridge gave birth to the couples third child, a son named Louis, on April 23. But the question is, are Kate and William done with having children?

The Duchess suffered from hyperemesis gravidarum, an extreme morning sickness in all three of her pregnancies. A condition that would ordinarily detour a women’s decision to not have anymore more children, but it didn’t stop Kate from going for a third child.

The Anticipation for Royal Baby Number Four Has Already Begun

Some have a theory that the Royal Couple wants to mirror the Queen and go for a fourth and hopefully have another girl. “Wills would love to emulate his grandmother and have four children and he would be very happy if it was another girl," one Royal source claims.

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As we turn the corner toward summer, I'm thinking about time out in the sunshine. Some of my favorite moments on any royal tour are when William and Kate get casual and enjoy a more nature-based activity together. This early morning safari the couple took in Kaziranga National Park definitely tops my list. They rose with the dawn (my favorite time of day!) and toured the park in jeeps while the sunlight was still fresh and the air cool. They look so happy in all the pictures. 🙂 . . . . #louisarthurcharles #princelouis #princelouisofcambridge #DuchessKate #PrincessKate #DuchessofCambridge #KateMiddleton #middleton #KensingtonPalace #BuckinghamPalace #kensington #britishroyals #britishroyalfamily #royalfashion #royalengagement #katemiddletonstyle #royals #princess #royalBaby #royal #princesscharlotte #princegeorge #royalwedding #weddingveil #princewilliam #dukeofcambridge #replikate #kaziranganationalpark #kaziranga

A post shared by Kate Middleton Blog (@fromberkshiretobuckingham) on May 9, 2018 at 5:23pm PDT

But another Royal source assures that Kate and William are thrilled to be a family of five for the time being. “They are absolutely thrilled with having three children. They are soaking up every minute they can. Their dream was always to have three kids. Kate knew she wanted a third not long after having Charlotte, but this time around they seem very content."

But the source did add, “Never, say never!"

And another source revealed that the new family of five is adjusting quite well to their newest addition, especially the adorable 3-year-old Princess Charlotte.

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Charlotte es tan adorable😍❤ #KateMiddleton #DuquesaDeCambrige #CharlotteDeCambridge #Princesa

A post shared by Katherine Elizabeth Middleton❤ (@_kateemiddleton_) on May 10, 2018 at 7:04am PDT

The Princess is taking her new role of a big sister quite seriously and rarely leaves her brother’s side. “Charlotte is really enjoying having a younger brother to play with. She’s taking her big sister duties very seriously…Charlotte is just like George. They have a great bond, and a similar connection is growing between Charlotte and Louis."

The bond between Charlotte and Louis was apparent in the official photo that Kensington Palace released on May 5 to mark Louis’ arrival. The photo op was taken by the 36-year-old Duchess and the new mum captured the affinity that Charlotte already has for Louis. The Princess is holding her baby brother in the picture and giving him a kiss on the forehead.

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‪The Duke and Duchess of Cambridge are very pleased to share two photographs of Princess Charlotte and Prince Louis, taken by The Duchess at Kensington Palace.‬ This image was taken on 2nd May, on Princess Charlotte’s third Birthday.‬ ‪The Duke and Duchess would like to thank members of the public for their kind messages following the birth of Prince Louis, and for Princess Charlotte’s third birthday.‬

A post shared by Kensington Palace (@kensingtonroyal) on May 5, 2018 at 4:00pm PDT

So will there be a fourth? Only time will tell…