Kate Middleton couldn’t get enough of her youngest son, Prince Louis.

Just recently, Middleton and her sister-in-law Meghan Markle reunited to watch their husbands Prince William and Prince Harry’s polo match. The Duchess of Cambridge brought her three children Prince George, Princess Charlotte and Prince Louis along. Markle also brought her baby, Archie, to the match.

Prince George and Princess Charlotte were seen playing and running around. Meanwhile, Middleton was more focused on her youngest child. The mother and son were even photographed enjoying their time together. In a snap shared on MazSight, sweet baby Louis can be seen giving his mom a kiss on the lips.

The 1-year-old royal continued to steal the hearts of royal fans when he was seen wearing Middleton’s oversized sunglasses while giving a tongue-wagging smile to aunt Markle and cousin Archie.

Middleton couldn’t help but laugh with his son’s adorable antics and playful exchange. According to People, Prince Louis’ funny but lovable shots were meme-worthy.

Fans have been waiting for the Duke and Duchess of Cambridge’s fourth baby announcement. The odds of Middleton expecting royal baby no. 4 has been slashed following the couple’s appearance at Archie’s baptism.

According to Corals’ spokesperson Harry Aitkenhead, Prince William and Middleton will likely add another member to their family in the next 18 months or so. Some are already betting for the couple to make a pregnancy announcement this year.

However, others believe that Prince Louis might be Middleton’s last baby that’s why she is extra sweet to him.

“You just want to baby the third child for as long as possible, especially if you’re thinking they will be your last,” parenting expert Victoria Jennings said.

Jennings added that Middleton loves her children equally and at present, there is so much for her to do and that she keeps on juggling between work and keeping them happy. Thus, a fourth baby might be unlikely.

“I’m sure that Kate is no different to all mums in that she loves her children equally, and would do anything for them. There is however only so much of her to go around and so there is always a juggling act between keeping all of them happy and safe at the same time.”

Prince Louis Kisses Mom Kate Middleton On The Lips During Polo Outing Pictured: Prince William and Middleton pose for photographers with their newborn baby boy Prince Louis of Cambridge outside the Lindo Wing of St Mary’s Hospital on April 23, 2018 in London. Photo: Getty images/Dan Kitwood