Lopez's lawsuit, filed Monday in Los Angeles Superior Court, alleges that Noa, her first husband, violated a confidentiality agreement by distributing the manuscript of his book to publishers, TV's The Insider reports. Lopez, 36, is seeking a restraining order to keep the manuscript from becoming public.
A description of the manuscript first appeared Jan. 11 in the New York Post, prompting Lopez's lawyers to contact Noa's legal representatives. Noa replied in a letter that he was planning to keep shopping his book, the suit claims.
In another letter, the suit shows, Noa said "that he would not agree to refrain from marketing his book unless (Lopez) paid him the sum of $5 million."
Noa's attorney, David DeRubertis, did not return calls from the Associated Press seeking comment.
The confidentiality agreement was reportedly drawn up last October, after Noa sued Lopez for firing him without cause as manager of her Pasadena, Calif., restaurant, Madre's. Noa dropped the suit and agreed not to disparage Lopez or make money off disclosure of details of their relationship, court papers claim.
Lopez met the Cuban-born Noa while he worked as a waiter at a Miami restaurant. The two married in 1997 and divorced 11 months later. Her next marriage, to choreographer Cris Judd, in 2001, lasted nine months. Lopez has been married to Marc Anthony since 2004.