Meghan Markle is depicted as a cold, ungrateful and opportunistic social climber who will stop at nothing to get what she wants in her half-sister Samantha's new memoir, The Diary of Princess Pushy's Sister: A Memoir, Part One, The Royal Observer was the first to report.
But it is not just Meghan who the book goes to great lengths to criticize, as Samantha also takes aim at the Queen for not postponing the royal wedding.
The Royal Observer has exclusively obtained a copy of the memoir, in which Samantha writes that she was furious to learn that despite her father Thomas having suffered a heart attack that made it impossible for him to fly to London for the nuptials, there was never any talk of changing the date.
Samantha goes on to comment that, despite the church setting, "everything that was happening went against the grain of religious tenets."
"[I] knew it was not unreasonable that they reschedule given resources available to make that happen," she writes in the book.
In the end, her father watched from his home in Mexico, and she was joined by a German television crew for a paid television appearance.
The controversial 328-page book has been subject of mystery. Initially scheduled for a January release, it was promoted as such: "Amidst a firestorm of fake news and media mayhem, Samantha Markle shares the truth about her life and family against all odds and ultimatums, as a royal fairy tale plummets from the tea towels. Sometimes the truth really is stranger than fiction."
In the advance copy provided to Royal Observer, Samantha writes that despite all the heartache her sister had put their father through, she still did her best to be happy for Meghan and Prince Harry on their big day.
The Diary of Princess Pushy's Sister: A Memoir, Part One is expected to be released later this week.