Jennifer Lopez joined Casper Smart and her 4-year-old twins, Max and Emme Anthony, at a park in Calabasas yesterday. J Lo enjoyed the afternoon with Casper and her children, who she refers to as her "coconuts," following Friday night's concert in Chicago and Saturday's in Kansas City. She's been touring North America with Enrique Iglesias for the past month, and they're scheduled to entertain crowds up and down the California coast through mid-August. Rumors of trouble between Casper and J Lo bubbled up last week. However, the two appeared as happy as ever during Jen's 43rd birthday celebration just two weeks ago.