Spears and Federline also were prohibited from making derogatory remarks about each other in their children’s presence and from using “corporal punishment” to discipline them. Both parents also were ordered to complete the court’s “Parenting Without Conflict” class. As Spears attempted to regain custody of her children, her mother, Lynne Spears, announced plans to write a book about raising her family in the glare of the media spotlight. “Pop Culture Mom: A Real Story of Fame and Family in a Tabloid World” is set for release May 11, which is Mother’s Day, said Curt Harding, a spokesman for Thomas Nelson Inc., a Christian book publisher. He did not release further details.