They've been a model of committed coparenting since announcing their separation almost six years ago. And Ben Affleck, 48, and Jennifer Garner, 49, kept up their streak on Saturday when they joined forces to support their son Samuel, nine, at his swimming class in Los Angeles. The meet-up comes just two days after the Justice League star sparked reunion rumors with his former fiancée Jennifer Lopez after he was seen exiting an SUV that appeared to belong to the Hustlers star. Family time: Ben Affleck, 48, and Jennifer Garner, 49, reunited to support their son Samuel, nine, at his swimming le...