A โcompletely rockedโ Prince William is trying to keep stoic for his family and has โvowed to not leave Kateโs sideโ, as the Princess of Wales continues to battle a mystery illness in hospital, a royal source tells Womanโs Day.
โThis has been a huge wake-up call for him, seeing her so vulnerable. Normally sheโs the rock-solid strong one whoโs always got his back. No one ever expects to be enduring long hospital stays in their 40s,โ a source tells of William, who is fitting the school run in around hospital visits to see Kate.

Hospitals are not fun but Kate is in the lap of luxury.
(Credit: Getty)Issuing a media statement on Thursday, Kensington Palace revealed that Kate, 42, is in hospital recovering after โplanned surgeryโ to treat an unspecified but non-cancerous abdominal condition.
Abiding by Kateโs desire to โmaintain as much normality for her children as possibleโ, the palace will โonly provide updates on her Royal Highnessโ progress when there is significant new information to shareโ.
Abdominal surgery is a broad term, but according to medical experts often involves treating diseases, conditions or injuries to the stomach, bowels, liver, gallbladder or pancreas.
While the operation, which she underwent last Tuesday was deemed successful, Kate is expected to stay in their care for 10 to 14 days, and โbased on current medical adviceโ is to rest and recuperate at home in Windsor for two to three months, meaning it is unlikely she will return to royal duties until after Easter.

The prince is putting on a brave face in front of the children, despite being racked with worry for Kate.
(Credit: Getty)Royal insiders say Kateโs recovery time is indicative enough to know her condition is serious, despite the statementโs cavalier tone, and is said to have shaken up the royal family, particularly William and their three children, Prince George, 10, Princess Charlotte, eight, and Prince Louis, five.
โThe children are missing her being at home, especially Louis, but Williamโs being incredibly strong, considering everything on his plate,โ the insider adds, noting his father, King Charlesโ planned surgery to treat an enlarged prostate later this month.
Will has also officially postponed a slew of royal engagements as well as overseas travel so he can focus on taking care of Kate and their children.
The insider spills that Prince George has also been stepping up to help his father out by โtaking charge of his siblings while his mum is in hospitalโ.
โHeโs taking the lead from his dad and knows heโs helping him by keeping Charlotte and Louis out of trouble.

Charles, Kate and William will all scale back their duties for a while.
(Credit: Getty)โHeโs been a hero and has them all making โget wellโ cards and picking out small gifts and books to take to her when theyโre visiting.โ
The source says that while Kateโs illness has frightened all three of the kids, โGeorge has very sweetly promised his mum and dad to look after Charlotte and Louisโ.
โHeโs a good kid and already proving to be an invaluable member of the family.โ
Knowing her family are OK will only help Kateโs recovery, with sources saying that while sheโs exhausted, sheโs โon fighting form and is determined to wow all her doctors and nurses with an early departureโ.
โShe canโt wait to be home, but she knows she has to focus on her health first. Thereโs a reason air stewards tell you to put the oxygen mask on yourself first โ sheโs no use to anyone until sheโs safely back on her feet, in her own time.โ