Kate, Princess of Wales, underwent a "planned abdominal surgery" on Tuesday, January 16, which has many concerned about the long recuperation HRH will need.
"I have no idea what it is she doesn't want us to know at this stage, but I do know that she will want to be back home with her family and her children as soon as possible," royal commentator Jennie Bond told an outlet.
"And so that makes it all more surprising that she may not be back home for a fortnight. Prince William is going to divide his time between looking after the children and being at his wife's bedside, and therefore he won't be carrying out public engagements either," Bond added.
The announcement was followed by another from Buckingham Palace that shared how King Charles III will undergo "routine" surgery next week to correct an issue with his prostate. But it is the "concerning" and "odd" condition of Prince William's immensely popular wife that has royal watchers on edge.
"It's going to be a long stay in hospital afterward — these days they get the patients out of hospital as soon as possible back on their feet," royal journalist Michael Cole, who has covered the royal family for decades, told an outlet. "So that also does indicate the seriousness of the nature of whatever it is that is ailing her."
When asked during an interview why the news was so "secretive" and "sudden" on the part of Kensington Palace, Cole added: "What's the point of announcing it beforehand? It will only create speculation."
He continued: "And I'm sure the clinic didn't want hordes of cameramen around the doors. And I'm certainly sure that the Princess of Wales, because this is a very private matter as far as she's concerned and her husband's concerned, wouldn't want that. The fact is, it's happened. It happened yesterday, [and] they've announced it today. I think that that is entirely commendable and right."
This morning, the Prince of Wales was spotted leaving the private, London Clinic, where Her Royal Highness will spend the next 10-13 days being monitored post-op. It is also being reported that the future queen's parents, Michael and Carole Middleton, and her sister, Pippa, have regularly been by her side.
It is unknown if the King and Queen Camilla will visit the Princess of Wales or if any of her three children will be brought into the hospital.
The palace's official statement on Tuesday read: "Her Royal Highness The Princess of Wales was admitted to The London Clinic yesterday for planned abdominal surgery. The surgery was successful and it is expected that she will remain in hospital for ten to fourteen days, before returning home to continue her recovery. Based on the current medical advice, she is unlikely to return to public duties until after Easter."
GBN interviewed Bond.