In her new memoir, Jamie Lynn Spears shares a "recent" personal message she received from her big sister, Britney Spears.

Jamie Lynn, 30, released her book, "Things I Should Have Said," on Tuesday. It touches on her childhood in the spotlight, her teenage pregnancy, and her relationship with Britney.

"In a recent text from my sister, she stated herself: ‘I know it’s not your fault and I’m sorry for being so angry at you. Although I’m your big sister, I need you more than you need me and always have,'" the "Sweet Magnolias" star writes in the book.

It's unclear when Britney sent the alleged text message. Fox News has reached out to the singer's reps for comment.

BRITNEY SPEARS CALLS PUBLIC FEUD WITH SISTER JAMIE LYNN 'TACKY' AS THEY SEEK TO END THEIR SPAT

Britney Spears and her sister Jamie Lynn Spears at The Teen Choice Awards, held at the Universal Amphitheatre in Los Angeles, California, August 4, 2002.  ( Kevin Winter/Getty Images)

Britney and Jamie Lynn's strained relationship became public in the past year as the "Toxic" singer sought to free herself from her conservatorship. In Britney's legal fight, the pop star called out her family members both in court and on social media for failing to help free her from the 13-year court order. 

Specifically, Britney accused her and Jamie Lynn's father, James P. Spears, of "conservatorship abuse." She also claimed her family has profited off of her fortune and "should be in jail."

Britney then kicked off 2022 by purging a lot of her followers on Instagram, including her famous sister. Britney and Jamie Lynn have also engaged in a war of words on Instagram in the last couple of weeks as Britney voiced her anger over Jamie Lynn's promotional interviews for her book.

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Jamie Lynn Spears' "Things I Should Have Said" was released on Tuesday. (mage Group LA/Disney Channel via Getty Images)

Britney, 40, issued a harsh rebuke of Jamie Lynn, 30, after stories from her book started to spur headlines. In the memoir, Jamie Lynn writes about a time Britney allegedly locked the two in a room with a knife. However, Britney called the claims "crazy lies."

"Please please stop with these crazy lies for the Hollywood books," Spears wrote Friday. 

"You've stooped to a whole new level of LOW … I've never been around you ever with a knife or would I ever even think to do such !!! The only knife [knife emoji] I ever saw you with at home was cutting the biggest pieces of squash [emoji} I ever saw in my life and it was way too big for me to cut …" Spears also wrote.

"Now and only NOW I do know only a scum person would make up such things about someone …. I'm actually very confused about you making that up because honestly not like you at all !!!!"

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On Friday, Jamie Lynn reacted to Spears' remarks on social media.

"Last thing I want to be doing is this, but here we are…It's hard to see these posts, as I know the world also feels. I just wish her well. Brit, I am always here, you know behind the scenes I have always been here. It's become exhausting when conversations, and texts we have in private don't match what you post on social media. I  know you're going through a lot and I never want to diminish that, but I also can't diminish myself," Jamie Lynn wrote in a lengthy statement shared to her Instagram on Friday.

Jamie Lynn and Britney Spears have been feuding on social media in recent weeks. (C Flanigan/WireImage | Kevin Mazur/WireImage)

She also asked Britney to take their feud offline.

"Britney - Just call me, I have attempted many times to speak to you directly and handle this privately like sisters should, but you still choose to do everything on a public platform," Jamie wrote Saturday. "In the meantime, please stop continuing the narrative that I haven’t been there for you or that I’m making things up. I’m happy to share how many times I’ve reached out to you, supported you and tried to help you. This is embarrassing and has to stop. Love you." 

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Most recently, Jamie Lynn appeared on the "Call Her Daddy" podcast to promote her book.

Britney Spears's family: Jamie Spears, Bryan Spears, Jamie-Lynn Spears, Britney Spears and Lynne Spears. (Kevin Mazur/WireImage)

Among the many things that Jamie Lynn discussed was the social media attention she's been getting lately, saying that the most hurtful posts she sees are ones claiming she "didn't do anything to try and help my sister."

"I very much did many things," she stated.