Prince William and Prince Harry reunited on Thursday for an unveiling of a statue of their late mother Princess Diana at Kensington Palace on what would have been her sixtieth birthday. Despite this, True Royalty TV co-founder Nick Bullen is speaking out to say that a reconciliation between the two brothers would “be very difficult.”

“It is still very much a work in progress,” Bullen told Fox News. “An awful lot has been said between the two. So much dirty linen has been put out in the public, so to speak.”

Bullen went on to add that sources have told him that even amidst their reunion, William couldn’t ignore his fury towards Harry for repeatedly speaking out against the royal family in interviews.

“I am told William is absolutely furious at how Harry and Meghan have shared their views about the royal family, about their own immediate family, with the world’s press,” Bullen alleged. “I think it’s going to be incredibly tough to come back from that, on all sides. Harry and Meghan feel they haven’t been supported by the monarchy. But ultimately, William is a king in waiting. Duty to him comes first. His duty is to protect the crown and to protect the institution. And that’s what William is going to do.”

Bullen then said that while William and Harry were in touch with one another to prepare for the statue unveiling, the conversations were brief.

“I’m told the boys have been communicating by text, but they’re relatively short texts,” he claimed. “But they are communicating.”

Bullen also said that William and Harry were doing “everything” they could to keep things civil at the statue unveiling, adding that there’s no doubt that their mother “would have been heartbroken” over their strained relationship.

“If Diana were around today, I think she would have banged their heads together like any mother,” he said. “I’m told by people that knew her well that she would regularly sit the boys down and say to them, ‘You only have each other. You two are the only ones who know what it’s like to go through this life. You have to look after each other.’ And they did. They were such an amazing team for so long.”

“I remember filming them on a number of occasions and they were just dynamite together,” Bullen recounted. “I think she would have been distraught at the current state of affairs.”

William is not the only person in the royal family who has been impacted by Harry and Meghan Markle’s interviews, according to Bullen.

“I’m told that their father, the Prince of Wales, is really hurt by everything that he’s heard, everything that’s been said,” Bullen alleged. “He was incredibly welcoming to Meghan Markle. He really embraced her and really enjoyed having her be a part of the family. When he walked her down the aisle on her wedding day, it was his way of welcoming her with open arms. He certainly wasn’t expecting this outcome.”

Despite everything that has happened, Bullen is hopeful that the brothers will reconcile at some point in the future.

“They know what they’ve got to do, and I’m sure they will do everything they can to get it right,” he said.