The rift between Britney Spears and her sister Jamie Lynn just jumped off social media and into the courts.
Britney's lawyer sent Jamie Lynn a cease-and-desist letter telling her to stop, quote, "publicly airing false or fantastical grievances" in order to sell copies of her new autobiography.
It adds, quote, "If you fail to do so or defame her, Britney will be forced to consider and take all appropriate legal action."
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Meanwhile, Britney continues to publicly air HER grievances.
Yesterday she added to that "hot chocolate" post from the other day and went after Jamie Lynn even harder.
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