www.EmploymentCrossing.com An author who claims Jerry Seinfeld's wife plagiarized her cookbook says she wasn't amused by jokes the comedian made last year on late-night television. Missy Chase Lapine filed papers in federal court on Tuesday explaining her position for a December hearing. She claimed that her 7-year-old daughter was upset after Seinfeld joked on David Letterman's show that people with three names - James Earl Ray and Mark David Chapman, for instance - turned out to be assassins. Lapine said she "never felt so frightened and vulnerable" as when her daughter came home from school "and asked, 'Mom, what is an assassin?'" In a lawsuit filed last year, Lapine claimed Jessica Seinfeld got ideas for her cookbook, "Deceptively Delicious: Simple Secrets to Get Your Kids Eating Good Food," from Lapine's book "The Sneaky Chef: Simple Strategies for Hiding Healthy Foods in Kids' Favorite Meals." The Seinfelds' attorney said in a statement Wednesday: "As a comedian, Jerry has a right under the First Amendment to tell jokes. Ms. Lapine, on the other hand, was not joking when she maliciously accused Jessica Seinfeld, who also has young children, of plagiarism, a charge that is demonstrably false." Earlier this year, lawyers for Jessica Seinfeld called the lawsuit opportunistic and accused Lapine of falsely claiming she invented the idea of hiding fruits and vegetables in children's meals as many other books and educational sources were utilizing it too. In her affidavit, Lapine said she did not make accusations against Jessica Seinfeld to gain media attention or celebrity status.