Attorney Charles Harder, who is representing Robert Trump—the brother of President Donald Trump—in a lawsuit seeking to block publication of Mary Trump’s upcoming book about the president and his family, argued that Mary Trump is still bound by a confidentiality agreement even though her uncle has been elected president.

In a reply brief asking for a preliminary injunction late Tuesday, Harder argued that the book’s publisher, Simon & Schuster, should not have hurried toward publication after receiving notice that Mary Trump had signed a confidentiality provision of the 2001 settlement agreement associated with her grandfather Fred Trump’s will, which prohibited her from publishing information about the president, Robert Trump and their sister, former Judge Maryanne Trump Barry of the U.S. Court of Appeals for the Third Circuit, without the trio’s consent.