Thomas, who says he recently had heart surgery, has hit out at his daughter for cutting him out of her life since his mistake.
In an earlier Tweet, Grant, 53, said that the public perception of the duchess is clouded by her fame and social status, which prevent people from seeing her for what she is in a similar way people are incapable of acknowledging Trump's faults.
"He was the one who was always there for her. Fake waves and smiles can stop".
She was in a relationship with celebrity chef Cory Vitiello for nearly two years, before they broke it off in 2016 but the two remain good friends.
The Prince of Wales was asked to step in to walk Meghan down the aisle after her father Thomas revealed he could not attend the wedding. While her mother Doria Ragland recently made the move to the United Kingdom to be closer to her daughter, she's very publicly estranged from much of the rest of her flesh and blood.
"MEGHAN!? her dog was doing his business".
To be fair, the Duchess oozes confidence, and according to Judi she is "more confident than Harry by a mile".
She had holidayed there every year until her death, and now Charles - who was very close to his grandmother - spends summer there with Camilla every year.
She added: "Sorry folks there is no valid or a good argument in favor of inhumane treatment of both sides of the family and a best friend of 30 years". "She's not fussy - she's just trying to get it on and get out the door".
Grant's Twitter is set to private, so only those she allows to follow her are able to see her posts.
"By pushing him forward ever so slightly, she boosts the Prince's ego and profile, making him feel more of an alpha male in the situation". I think she's under too much pressure.