The Queen fears she is going to miss out on the upbringing of Prince Harry's son Archie, a source has revealed in the new issue of American publication US Weekly.
The monarch is "heartbroken over the thought of not getting to see her great-grandson," the source says. "The queen would love to have a relationship with Archie, but it's looking unlikely that will ever happen."
"The queen's worst fear is that she may never see Archie again," the source says. "She's trying to stay optimistic about this situation and would never stoop to casting any aspersions on Meghan's character – even after everything that's happened."
In other news, the Duchess of Sussex is to make her first official public appearance in the UK following the Megxit crisis.
Meghan will join the Duke of Sussex at the annual Endeavour Fund Awards at Mansion House in London on Thursday evening.
The event celebrates the achievements of wounded, sick and injured servicemen and women who have taken part in sporting and adventure challenges.
It will be the couple's first joint official royal engagement since announcing their decision to step down from royal duties.
American ex-actress Meghan opened up about her struggles with royal life in an ITV documentary filmed on their Africa tour in the autumn.
She said she had tried to cope with the pressures by putting on a "stiff upper lip" but she was not prepared for the intensity of tabloid interest.
"It's not enough to just survive something, that's not the point of life. You have got to thrive," she added.
Meghan told presenter Tom Bradby: "Not many people have asked if I'm OK."