Meghan’s half-sister Samantha and half-brother Thomas Jnr were both teenagers when she was born. The arrival of the baby caused some tension, with Samantha allegedly getting jealous of the attention Meghan received from their father Thomas Snr. Meanwhile, Thomas Snr played a disgusting prank on Thomas Jnr and his friends in order to protect Meghan, according to royal biographer Andrew Morton.
Mr Morton wrote in his 2018 book ‘Meghan: A Hollywood Princess’ that Thomas Snr had previously said to his son that if he and his friends wanted to smoke cannabis they should do so only in the house.
However, this changed after Meghan was born.
Speaking to Mr Morton, Thomas Jnr recalled the prank his father pulled to stop him smoking cannabis while Meghan was around.
Mr Morton wrote: “Tom Jnr told me that on one occasion he and his friends were smoking a spliff in the living room while Meghan was in the nursery crying.
“His father announced loudly that he was going upstairs to change her nappy.
“Shortly afterwards, he appeared in the sitting room carrying a full nappy.
“He joined the boys on the sofa, took a spoon out of his pocket and started eating the contents.
“Grossed out, the boys fled the house.
“Only later, did he reveal that he had earlier substituted chocolate pudding into a fresh nappy.”
This was Thomas Snr’s “quirky” way to impart some discipline into the otherwise laissez-faire household.
Thomas Snr’s devotion to Meghan ended up being a sore point for some in the family.
For example, Samantha felt sidelined by her father’s love for the new baby, especially as he had spent most of his time working when she was young.
Mr Morton said: “Not only was [Samantha] indifferent to the baby – now nicknamed Flower or Bud – but she felt left out on the sidelines, her father utterly devoted to baby [Meghan].
“Doubtless she recalled his frequent absences when she was growing up and felt somewhat jealous of the attention now focussed on her baby half-sister.”
Samantha also felt that her father was not spending enough time using his contacts in the entertainment business to give her a leg-up in the acting or modelling world.
Meghan is now estranged from all three of them, with her mother Doria Ragland being the only one to be invited to her wedding to Prince Harry last year.
Samantha’s alleged jealousy of Thomas Snr’s love for Meghan could be the root of the family’s feud.
She has said on a number of occasions that she plans to release a book about Meghan and their relationship.
Royal commentator Angela Morland said on This Morning in April: “She says it’s witty and heartfelt – this from the women who called her sister Cruella de Vil and said she was going to be responsible for their dad’s premature death.
“The thought that Samantha is going to write a witty and heartfelt tome on this lovely sisterhood, I don’t think so.”
The Duchess of Sussex’s father, sister and brother have all spoken to the press about her, after claiming she has shut them out.
They have both criticised her and begged her to reach out.
After giving birth to baby Archie last month, it is unclear whether Meghan will allow her family to meet the child.
Meghan and Harry called their first-born Archie Harrison Mountbatten-Windsor – a name that gives a nod to Prince Philip’s heritage.