By Chloe Stewart Jennifer Lopez and Ben Affleck showed they have a lot of banter in their relationship in J.Lo’s new Amazon Prime documentary, The Greatest Love Story Never Told. In a moment where Jen, 54, is seen telling Ben, 51, about the set-up of her recently-released “cinematic odyssey” This Is Me Now: A Love Story, Hollywood actor Ben mocks Jennifer over the age she is proclaiming to be during one of the scenes. Reading the direction, she tells Ben: “Opening her eyes in a hospital bed, younger, age 28, and she wasn’t emaciated, but exhausted.” Ben interrupts and says: “Technically you we…