Samantha Grant denied trying to cash in on half-sister Meghan Markle's fairytale romance with her upcoming book.
The sibling addressed the allegation while appearing on the British TV show The Wright Stuff on Channel 5.
"I think the term 'cash in' is a low blow," Grant told host Matthew Wright. "I think any of us who have experiences and feelings, positive, warm, insightful or otherwise and we are able to share them apparently—I wouldn't say that it's we're cashing in because there's certainly a large audience and market of people who are interested and curious. So why not share information that is socially and historically valuable? I feel like it's kind of a service to do that."
Grant also defended the title of her book The Diary of Princess Pushy's Sister and said it wasn't a "slamming tell-all."
"People have taken the title so literally, and I think that's funny," she said. "I chose the title because I was more making a mockery of tabloids who, at one point, called my sister Princess Pushy. The opposite is true. And so I thought, you know, to make fun of that and illustrate that she really is not, I'm going to choose that title and run with it."
News of Grant's upcoming book broke in April. A source told E! News "Samantha Grant doesn't have a relationship with Meghan Markle and she never has." The source also claimed Grant only recently started identifying as Samantha Markle.
In addition to discussing the book, Grant talked about the series of tweets she sent after Prince Harry said the royals were the family Markle "never had." At the time, Grant claimed Markle has "a large family who were always there with her and for her."
Grant told Wright she wasn't hurt by the prince's comment and that she interpreted it as her family not being able to celebrate the holidays together due to their busy lives.
"I think he was referring to the family all being in one place—children running around, a large gathering. It's lovely that she can have that," she said. "So, it was more a matter of timing and geography and getting together in one place than having a family per se."
She also claimed that her tweets were "very positive" and "taken far out of context."
Even though Grant claimed her father Thomas Markle will be the one walking Markle down the aisle, a source told E! News the actress hopes to have her mom Doria Ragland do the honor.
Watch the video to see the full interview.