Meghan Markle's half-sister releases 'tell-all' book with sensational claims about 'controlling' Duchess Samantha writes that her father sounded upset when she called to check in with him days ahead of Meghan's wedding. February 4, 2021 06:28 GMT Meghan Markle's half-sister, Samantha Markle, finally released her tell-all memoir about the Duchess, making several sensational claims about the British royal and her relationship with their father, Thomas Markle. In the autobiography, titled "The Diary of Princess Pushy's Sister: A Memoir, Part One," Samantha promises readers that the "truth is stranger than fiction." The author accused her half-sister of being "controlling" towards their father, and noted how she and the royal family should have postponed her and Prince Harry's wedding so Thomas Markle could attend, reports The Sun.