Kate and William's rise fuels royal rift with Camilla.

Behind the scenes at Buckingham Palace, King Charles is struggling to calm Queen Camilla’s fears as she panics over Prince William and Princess Kate’s growing responsibilities during his ongoing cancer recovery.

According to royal insiders who spoke to Heat World, the tension between Camilla and the Waleses has escalated into a full-blown standoff.

The Queen Consort is reportedly terrified that she will be pushed out of the royal picture the moment William ascends the throne.

“The fact is, Camilla knows that eventually William and Kate will be King and Queen; seeing them taking on more responsibility is a constant reminder that things are changing, and she's terrified of what that could mean for her own position,” a well-placed source told the outlet.

King Charles, who has been undergoing treatment for cancer, finds himself caught between his wife and his son.

The monarch is reportedly attempting to “reassure” Camilla the best he can, trying to get her to “stop obsessing,” but “nothing he says helps,” according to the insider.

Camilla’s fears have grown to such an extent that she worries Kate has “purposely left her out of meetings” to “stop her from having a say in things.”

The source also said Camilla feels William and Kate have been “too keen to step in” and take charge during the King’s health battle.

While she “logically understands the growing need for ‘help,’ given the King’s health,” the insider said, “what she doesn’t appreciate is how they are both going about it – in her view.”

“She feels it's too much, and William and Kate have been too keen to step in,” the source added.

For her part, Princess Kate is reportedly “tired of walking on eggshells” around Camilla.

A separate insider told Heat World that Kate has reached her limit and “is not going to hold herself back just because Camilla feels threatened.”

“She feels she has a job to do, and she wants to get on with it,” the source said.

The friction came to a head most recently at a State Banquet welcoming the Sultan of Oman.

Much of the coverage after the event focused on Kate’s choice of tiara — one once worn by the late Princess Diana.

Camilla was reportedly jealous of all the attention Kate received that evening.

Another point of contention arose when Prince William made an unexpected appearance on The Graham Norton Show to promote his Earthshot Prize.

This happened while Charles and Camilla were preparing for their royal tour of Antigua and Barbuda.

Camilla reportedly saw William’s TV appearance as a sign that the Waleses were hogging the limelight.

The Queen Consort is “desperately hoping Charles will continue to recover” and “have many more years on the throne,” the insider said.

But “she can't ignore the fact that he's getting older and has had serious health challenges.”

This is why she has been “working her tail off, especially these last few months; she wants to make sure her value is seen,” the source added.

Outwardly, the four senior royals continue to present a united front at public engagements.

But behind palace walls, the dynamic is described as increasingly frosty.

King Charles’s cancer diagnosis has accelerated the transition of responsibilities to William and Kate.

The Prince and Princess of Wales have noticeably increased their public appearances and their willingness to be photographed.

This has reportedly not gone down well with Camilla, who is starting to feel the heat.

Camilla’s position in the Royal Family has always sat on a rocky foundation, observers note.

With each day that passes without the King winning his fight against cancer, her anxiety reportedly deepens.

The insider described the Queen Consort’s mental state as one of growing panic.

She is concerned that William and Kate are looking to push her out entirely.

Camilla believes Kate has deliberately excluded her from meetings, limiting her involvement in royal decisions.

The fear has now taken the shape of envy, according to the outlet.

Camilla “hates” being outshone by Kate, the source claimed.

The Princess of Wales, meanwhile, is trying to make sure everyone gets their share of credit and praise.

But she is reportedly unwilling to limit her royal role to appease Camilla.

Kate has reached the point where she is not going to hold herself back, the source said.

The brewing friction comes as Charles and Camilla navigate a demanding public schedule following their Caribbean tour.

The King is relying on William and Kate to take on more duties as he focuses on his health.

But the very help he needs is fueling the tension between his wife and his son.

Charles is left trying to manage both sides while facing his own serious health battle.

The monarch’s attempts to reassure Camilla have not been successful so far.

“Nothing he says helps,” the insider said.

The situation raises a difficult question for the royal family.