Angela Levine predicts, Meghan Markle and Prince Harry will be kept far away from the Queen's residence.
Speaking to GB News, the royal expert revealed that the Queen's aides do not trust the Duke and Duchess of Sussex around them and will ensure that the 96-year-old's privacy is not compromised.
Meghan and Harry are due to return to the UK this week to celebrate the monarch's platinum jubilee.
Ms Levine said: "The Queen has handed them [Harry and Meghan] a kind of peaceful olive branch.
"[It is] because she wants everyone to be one in a family."
She continued: "I understand that because she wants everyone to be together, everyone in this country, everyone in the Commonwealth.
"Then you can't allow your family to be a big fight and difficult, so I think she's trying to say to the press and everyone, please be kind and try to get us all together" .
Ms Levine continued: "But I don't think Harry and Meghan can be trusted anymore.
"They want, like, there might be someone smart enough to come into a room".
She added: "We don't know if the Netflix guys are there, but I do know they've got extra protection".
She said that, because of this "they wouldn't let them go to Windsor Castle, or anything like that".
However, amid disbelief, the Queen will see a "very good moment" with Harry's daughter Lilibet.
She added: "I think it would be great for the Queen to meet her little great-granddaughter".