She wore a stunning white dress by Jenny Packham, complete with a stylish black striped belt and a matching bow at the neck. Charles, 75, is also fighting cancer, which was detected after a routine procedure at The London Clinic in January.

Speaking to People last month, Ailsa Anderson, who once served as the press secretary to the late Queen Elizabeth II, shared: “[Kate] might be the Princess of Wales, but she is still a mother and wife and going through the same set of emotions and worries and fears as anyone else in that set of circumstances would be.”

Even after Kate’s comeback at Trooping the Colour, another source dished to the publication: “The treatment [for cancer] is punishing, and it is different for different people, and the side effects can be unforgiving.”

In addition, royal expert and author Sally Bedell Smith dished to the outlet that it would have been “difficult to tell that either the King or the princess had been ill and undergoing some pretty rugged treatment.”

Another insider added: “Family is really important to the Princess of Wales, and she wanted to be there to support her family.” As Kate undergoes cancer treatment, her need for privacy has never been more paramount, according to People.

This need extends to her children and her husband, William, 42, as well. A former Palace aide shared with the publication that when it comes to the Wales family, especially regarding Kate’s cancer diagnosis, “The circle of knowledge was very tight.”