Britney Spears threatens to SUE sister Jamie Lynn for ‘derogatory’ claims about her in new book

BRITNEY Spears has threatened to take legal action against her sister Jamie Lynn.
The singer, 40, has issued a cease and desist letter to her sibling based on the 'derogatory' claims about her in Jamie Lynn's new book, Things I Should Have Said.
In the letter obtained by and , Britney's lawyer Mat Rosengart writes: "you cease and desist from referencing Britney derogatorily during your promotional campaign. If you fail to do so or defame her, Britney will be forced to consider and take all appropriate legal action."
Rosengart tells 30-year-old Jamie Lynn: "We write with hesitation because the last thing Britney wants is to bring more attention to your ill-timed book and its misleading or outrageous claims about her."
He adds: "Britney has not read and does not intend to read your book, she and millions of her fans were shocked to see how you have exploited her for monetary gain. She will not tolerate it, nor should she."
"Britney was the family's breadwinner and she also otherwise supported you. Publicly airing false or fantastical grievances is wrong, especially when designed to sell books. It is also potentially unlawful and defamatory."
Sources told TMZ Jamie Lynn had not yet received the letter.
This marks the latest in a series of events since Britney gained control back of her life last year after her father Jamie's conservatorship officially ended.
Most read in Celebrity
Ever since then Britney has been extremely vocal, slamming her family members especially her younger sister, Jamie Lynn.
In fact, the performer recently shared she wish she would have "slapped" her sibling as well as her mother Lynne, too
Britney and Jamie Lynn have continued to go back-and-forth amid the release of the Zoey 101 actress' memoir.
Plenty of harsh words and claims have been exchanged, including one allegation that Britney once grabbed a knife and locked her and Jamie Lynn in a room.
While speaking to JuJu Chang on ABC, Jamie Lynn reflected on the alleged incident: "I was scared. That was a moment I had.
"I also was fearful to really say anything because I didn't want to upset anybody, but I also was so upset that she didn't feel safe."
Britney would slam the claims, calling them "crazy lies" and telling her sister she's "stooped to a new low."