Lotte says people need to stop with her Elektra complex already. (I played 98% of the Mycenae family. I spell it traditionally.) Even though it's really a Myrrha complex, because Elektra barely KNEW her father when he went off to war and then Mumsy dear killed him - Myrrha actually had relations and...
I'm rambling again. He is more than old enough to be her father, (If I remember correctly?) in the book too. And if we talk musical, Raoul goes "Christine, Christine - whatever you may believe, whatever you may think, this man, this thing is not your father..." which just makes the whole seduced-thing even worse. At least in the book Christine doesn't think he's her Dad.