A friend of the award-winning lighting director - who has also sold stories and told lies about his daughter since she began her romance with Prince Harry - revealed to The Express, "This is so bittersweet for him."
"The thought of not being able to hold the baby or be there is torturing him.
"But he hasn’t given up hope they can reconcile."
The friend added, explained how Thomas is "finding it difficult to know what to do. Should he reach out to Meghan – or sit tight in the hope she reaches out to him?
"He told me: 'She’s been strong-willed and single-minded since she was a little girl and she’s always going to go her own way and do her own thing.'"
Worst of all, Thomas is now being mocked by his own friends, the source told.
"His pal said, 'You’re going to be the official royal grandfather-in-waiting… and waiting and waiting and waiting and waiting.' Thomas managed to force a smile but he told me later he felt stung.
"His greatest wish is for Meghan to forgive him and agree for him to fly to London to meet his latest grandchild."
Something tells us he might be waiting and waiting for a long time!