Meghan Markle’s estranged half-sister has launched yet another scathing blow on the Duchess of Sussex, saying that her marriage to Prince Harry will end in divorce unless they get “extensive counselling.”

Samantha Markle has been persistent in her assaults on her royal half-sister.

And it seems she has no intention of slowing down any time soon.

Samantha Markle said that the Duke is already ‘questioning’ the marriage and anticipated that things would ‘get nasty’ until he ‘starts dissenting or pulling back from her.’

For years, the sisters have had no relationship, and they haven’t met since the former actress began dating Harry.

But Samantha hasn’t stopped interfering in Meghan’s life since the shocking Oprah interview.

The 56-year-old American also called on the Sussexes to embark on a “apology tour” after the couple accused the Royal Family of racism during their explosive interview with Oprah Winfrey.

The scathing author has got a lot to say about Meghan and made the outlandish allegation during an interview with TMZ.

‘I see it ending in divorce unless they get extensive counselling and can agree to work on being honest, to work on apologies to everyone that they’ve damaged in the course of this bull in a china shop two-year spiel,’ she said.

“Nothing about any of this has been honest and the damage to the Royals has been massive, especially now.

“Maybe he’s already questioning it. He has to be if he has a functioning frontal lobe, come on! He’s not 12. He was in the military, he’s got to have a sense of, ‘oh my god, everything you said to me has been a lie’.”

Samantha added: “What man would be happy or comfortable with that? The minute, I believe, he begins dissenting or pulling back from her I think it can get nasty, unless he has a really good lawyer, they have really good counsellors. I don’t know what it’s going to take.”

When asked what Meghan and her father would have to do to “restore their relationship,” Samantha replied, ‘She would have to apologise – a public apology, god, I know would be like getting blood from a rock but she did a lot of public damage.

‘Really, I mean I really feel like this thing was all orchestrated that she needs to unravel the damage.

‘She did a lot of damage to a man who gave her an incredible life – so hurtful, so wrong. She would need to make the first move and, I mean, you know, parents are always unconditionally loving but god, she really hurt him.’

Samantha’s newly released book, titled “The Diary of Princess Pushy’s Sister Part 1,” had prompted Meghan to speak out.

“I think it would be very tell-all when you don’t know me. I grew up as an only child,” she pointed out.

“The last time I saw her, 18 or 19 years ago and before that, 10 years before that.”

‘She changed her last name back to Markle in her early 50s, only when I started dating Harry, so I think that says enough.’

Samantha, on the other hand, maintained that this allegation was completely false and provided more proof to back her up.

‘I was a Markle before she was,’ she said. ‘I though that was kind of weird that she would say I only changed my name back when she met Harry. Markle has always been my name.’

Samantha retorted, “how can she not know me?” when they had photos together.

Samantha previously said that “the truth was totally ignored and omitted,” while offering pictures and papers to refute each of Meghan’s allegations against her.

“I don’t know how she can say I don’t know her and she was an only child. We’ve got photographs over a lifespan so how can she not know me?,” she told Inside Edition.

Meghan said in the interview that she had suicide thoughts as she battled with royal life.

The 56-year-old also confessed that she had no compassion for Meghan, 39, who said during the startling interview that she struggled with suicidal thoughts during her time as a royal – instead accused the Duchess of using her “depression as an excuse for treating people like dishrags.”

The Markles’ feud was addressed in unaired segments of the Sussexes’ CBS sit-down with Oprah, who questioned her relationship with Thomas.

Meghan and Harry, together with their dogs and baby Archie, have adjusted into their new life in Los Angeles.