But more than 40 years after Robert F. Kennedy ran for president, Ethel Kennedy, his widow and mother of a famously rambunctious and socially conscious brood of 11, is finally, albeit reluctantly, getting her due in the documentary, Ethel, directed by her youngest child, Rory. “I think everyone fantasizes about the questions we wanted to ask our parents,” Rory Kennedy, now 43, says in a phone interview. “We don’t all have the time and opportunity to get that closure.”