The family drama between Britney Spears and her sister Jamie Lynn is intensifying -— big time. Britney’s lawyer Mathew Rosengart just sent a cease and desist letter to Jamie Lynn as she continues to promote her new memoir, “Things I Should Have Said.” The letter demands that she stop referencing Britney derogatorily during her promotional campaign. The letter then warns that if Jamie Lynn continued, Britney would “be forced to consider and take all appropriate legal action.”

britney spears,ie newsdesk,entertainment,Inside Edition,Inside_Edition,IE Newsdesk,ie entertainment,jamie lynn spears,free britney,making fun,disney,cease and desist,mathew rosengart,things i should have said,legal action,sister