George Lucas: I was thinking that this old guy could have been his mentor. He could have known this little girl when she was just a kid. Had an affair with her when she was eleven.
Lawrence Kasdan: And he was forty-two.
George Lucas: He hasn’t seen her in twelve years. Now she’s twenty-two. It’s a real strange relationship.
Steven Spielberg: She had better be older than twenty-two.
George Lucas: He’s thirty-five, and he knew her ten years ago when he was twenty-five and she was only twelve. It would be amusing to make her slightly young at the time.
Steven Spielberg: And promiscuous. She came onto him.
George Lucas: Fifteen is right on the edge. I know it’s an outrageous idea, but it is interesting. Once she’s sixteen or seventeen it’s not interesting anymore. But if she was fifteen and he was twenty-five and they actually had an affair the last time they met. And she was madly in love with him and he…
http://www.therobotspajamas.com/indiana-jones-child-rapist/