Meghan Markle’s sister labelled her estranged sibling the “DuchASS” as she took further umbrage to the new royal’s treatment of their father.
She wrote: “I am not candy coating anything anymore! The DUCHASS should be human to our father who has given her everything…
“He was the one who was always there for her. Fake waves and smiles can stop. The duchASS can bow to the daddy.”
In an earlier tweet she said the “celebrity status and wealth” of her sister was affecting public perception of her.
“People need to stop being so blinded by glare of celebrity status and wealth," she moaned.
“Trump said he could shoot someone and not lose votes. The same mentality applies to my sister.
“People believe anything and still follow in an ant line,” she wrote.
Samantha Markle is also known as Samantha Grant.
She has been outspoken on her opinions towards her sister in the past and stated that her sister could do more to help their father.
She has repeatedly publicly criticised Meghan after her romance with Prince Harry was revealed in November 2016.
She dubbed her “narcissistic and selfish” and claimed she always wanted to be a princess.
This is also not the first time she has called her sibling names on Twitter.
She previously labelled her “Cruella Deville”, in reference to the sinister 101 Dalmatians villain, and “Witchy Poo”.
The mother-of-three lives in Miami, Florida, with her partner and children.