Cancer-Stricken Kate Allegedly on a Mission to End 'Unhealthy' Prince William and Prince Harry Feud

The glittering façade of royal life continues to crack under the weight of an unresolved family conflict. While royal watchers speculated on whether the Sussexes would receive a coveted invitation to Sandringham this Christmas, the reality has proven far frostier, with Prince Harry and Meghan Markle expected to remain in California.

This outcome, sources reveal to Heat UK, has left Catherine, the Princess of Wales, deeply 'sad,' marking a failure of her Christmas wish to finally unite Harry and her husband, Prince William, after almost six years of bitter estrangement.

Just last month, the Duchess of Sussex, 44, found herself weathering another storm of social media criticism—ranging from behind-the-scenes leaks detailing a highly formal protocol request for a two-person interview, to being dubbed 'salmonella Sussex' after a questionable Thanksgiving cooking clip. These events, however, fade in significance compared to the deep, toxic rift tearing the Prince of Wales's family apart.

An insider close to the Palace told Heat UK the extraordinary emotional toll the feud is taking on the future Queen. 'Kate hates that things are so ugly between William and Harry, she says it literally keeps her up at night,' the source shares. 'She feels like it's this cloud hanging over everything, even if William won't admit that it's tormenting him, she can see that it is.'

Despite fully understanding William's anger over the damage Harry has caused to the Crown's reputation, Catherine possesses a rare empathy for her brother-in-law. 'She feels genuinely sad that he's going through that,' the source says, adding that Kate 'can only imagine how isolated he must feel so far away' from his family while making solitary trips back to the UK.

Royal Road Trip: Catherine's Plan to End the Grudge With Prince Harry

While Prince William, 43, remains 'furious' and has 'dug his heels in' against any reconciliation, the Princess of Wales, 43, is now on a 'mission' to 'make peace' with Prince Harry, and the royal diary may have given her the perfect opportunity.

The upcoming trip planned for William and Catherine to fly to America next 4th July to celebrate the 250th anniversary of US Independence is seen by the Princess as a 'golden opportunity' to put the toxic grudge firmly behind them.

However, the one major flaw in this ambitious plan remains her husband's less than positive response to the suggestion of a meeting. 'She knows it's going to be an uphill battle getting William to agree to anything but she has months to work on him,' the insider states. Kate is reportedly insistent, telling those around her that 'enough is enough and that these grudges need to be put aside'.

Given the Sussexes' plummeting popularity, a joint public appearance with the globally popular Waleses would undoubtedly boost their standing, especially stateside. Yet, sources believe a public offering of peace is 'highly unlikely'. Instead, the Princess is focused on privacy and discretion.

'Instead Kate is hoping that they can do something very discreet, break bread with them and make peace,' the source reveals. In a sign of her absolute determination, the Princess has even considered making a monumental compromise: 'She says she would even be willing to travel to Montecito just to finally get this over with once and for all, but that may be a bridge too far for William.'

A Cancer-Fueled Mission: Why Kate Middleton Needs Closure

The driving force behind Catherine's unwavering determination stems from her own recent health battles. Next month marks a year since she revealed she was in remission following her cancer treatment, a personal crisis that seems to have fundamentally shifted her perspective.

The source claims that after her battle with the illness, she's 'on a mission to let go of bitterness and negativity wherever possible, she says it's unhealthy.' The Princess believes in looking forward and accepts that while 'things have been said and done that cannot be taken back,' the endless conflict is damaging to everyone involved.

The trip to America, focused on strengthening ties between the UK and the US, offers a perfect thematic backdrop of goodwill. Furthermore, the couple plan to take some time off to enjoy some of the country's beauty, and Kate is hopeful the relaxation 'will put William in a more forgiving mood'.

Crucially, Catherine is not naïve about the delicate dynamic. She reportedly fully accepts that a reconciliation between the brothers will only work if Meghan Markle approves, as 'Harry does not move without her backing.'

The Princess of Wales has allegedly stated she is willing to respect those boundaries if it ultimately means bringing the family back together, demonstrating a profound personal commitment to healing that transcends royal protocol.

IBTimes UK has reached out to Prince William and Princess Catherine's reps for comments.