It’s always been believed that Queen Elizabeth will remain as the reigning monarch until her death and that she won’t retire from her post. However, a new expert claims there’s a chance that Her Majesty may actually step down and hand the throne to Prince Charles for one very specific reason.

According to Express UK, expert Duncan Larcombe believes that Queen Elizabeth, who is 93, will eventually step down due to loneliness, which is tied to her husband, Prince Philip, and the fact that he is currently retired, but also 98-years-old.

“A lot of people think that perhaps she might stand down once her husband the Duke of Edinburgh passes away,” he told Yahoo’s Royal Box. “That is certainly a possibility. She has always been with him, by her side and now he’s retired.”

He also noted that while others look after the Queen and stay by her side, the monarch has long earned the right to retirement as well.

“Yes, we see the other royals compensating and looking after her,” he said. “he’s in her nineties now, yes she’s in good health but I think she’s entitled to retirement by now.”

Royal Biographer Angela Levin also noted that the Queen appears lonely now at times when she attends events, but her husband isn’t in attendance. This most recently occurred during Trooping the Colour earlier this month. However, even if the Queen does miss spending time with her husband, she believes that the monarch will still fulfill her duties until the day she dies.

“I think she made this pledge that she would serve her country until she died and she’s just going to keep it,” Levin also told Royal Box. “She looks amazingly healthy, she’s very articulate, she’s very energetic, she stands up for an hour.”

“I felt a little sorry for her when she was in her coach because she was entirely on her own,” she added. “Quite understandably that Prince Philip didn’t come at nearly 98, but it was quite lonely and I thought, this is the loneliness of the monarch.”

Queen Elizabeth II
Queen Elizabeth II is seen at the Chichester Theatre while visiting West Sussex on Nov. 30, 2017, in Chichester, United Kingdom. Getty Images/Stuart C. Wilson