It was implied he was a womaniser. In one script a female student was going to kill herself over her relationship with Indy.
Daughters of professors were also on the menu - you know the back story with Marion, don't you?
It was Lucas' idea for Indy to have had an affair with her when she was very young.
The Raiders Story Conference Transcript, January 1978:
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.
Kasdan — And he was forty-two.
Lucas — He hasn't seen her in twelve years. Now she's twenty-two. It's a real strange relationship.
Spielberg — She had better be older than twenty-two.
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.
Spielberg — And promiscuous. She came onto him.
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...
Spielberg — She has pictures of him.
In Kasdan's script it ended up she was 15 at the time. And as told in the film, she went to Nepal with her father and eventually became a prostitute to pay the bills.
