Jennifer is the mom of 16-year-old twins.John Phillips/Getty ImagesJennifer Lopez plays the mother of NCAA wrestler Anthony Robles in 'Unstoppable.'Jennifer Lopez said she asked herself if she was enough for her kids when she was a single mom.She shares two kids from her previous marriage with Marc Anthony, which ended in 2014.Jennifer Lopez said she wondered if she was enough for her kids.In an interview with Entertainment Weekly published on Monday, the actor opened up about being a single mom."I've been a single mom at times in my life and [I've asked], 'Am I enough for them?'" said Lopez.