The controversy surrounding an edited family photograph released by Kate Middleton's office on Mother's Day has deepened speculation about the Princess of Wales's health and marriage, despite her apology and a carefully curated public appearance alongside her husband, Prince William. The image, which was intended to provide reassurance about Kate's recovery from abdominal surgery and thank the public for their support, was denounced as "manipulated" by global photo agencies just hours after its release.

In a statement released Monday, Kate admitted to personally editing the image, saying, "Like many amateur photographers, I do occasionally experiment with editing." The Times of London reported that a "shaken princess" told aides she wanted to "make amends and claim responsibility for her mistake" after the image, particularly one involving her children, had been "mired in controversy."

A "palace insider" told the Times that Kate felt "awful" about the incident and had "tried to make it the best it could be" because she knew how important it was for it to be "a nice picture." The insider added that Kate was also thinking of her own children, "hoping that they looked good for their own sakes."

Following the apology, Kate was seen in public alongside Prince William, sitting in the back seat of a chauffeur-driven car leaving their home in Windsor. The images, apparently taken with the couple's tacit consent, were widely published in U.K. papers. However, rather than quelling speculation, the car trip added to the sense that the Waleses were desperately seeking to change the narrative about Kate, with many questioning whether the situation is more serious than the palace is letting on.

The palace's handling of the situation has been criticized, with a sense of chaos or, at best, woefully lacking communications management appearing to envelop the institution. The car trip and Kate's apology have failed to adequately address the growing concerns and questions surrounding the edited photograph and Kate's health.

Commentators and social media users have raised questions about the timing of the photograph, Kate's appearance compared to recent paparazzi images, and the absence of her wedding ring. Analysis of the image's metadata by some media organizations has suggested that the picture was taken on Friday and edited twice using Adobe Photoshop on an Apple Mac.

While some defend Kate's actions as an innocent photo-editing error, others view the controversy as a result of the palace's own mishandling of the situation. The Daily Mail columnist Liz Jones and Sussex biographer Omid Scobie have even questioned whether Kate herself wrote the apology message signed with a "C."

The palace's refusal to release the original photograph or provide further details about the extent of the editing has only fueled speculation and undermined their efforts to clarify the situation. As a result, the mystery surrounding Kate Middleton's health and marriage has only deepened, with the intended "heartwarming posting" turning into a public relations blunder that has left the princess reportedly feeling "very sad."

The controversy has overshadowed the royal family's attempts to project a "business as usual" image, with senior royals attending the annual Commonwealth Service while the drama unfolded. As the palace continues to release only limited information, the speculation and questions surrounding Kate Middleton are likely to persist, underlining the need for more transparent and effective communication from the royal household.