“A Family Affair,” the new, somewhat superficial Netflix rom-com from writer/director Richard LaGravenese (“The Last Five Years,” “Beautiful Creatures”), is by no means brilliant or full of depth. And yet, still, the trio of Nicole Kidman, Zac Efron, and Joey King create an interesting dynamic; the ultimately well-intentioned film has some interesting things to say about late-in-life love, the many facets of self-absorption, and the way we use the notion of protecting the ones we love under the guise of selfish self-interest.
