the very ending, again (spoilers)
Okay it seems 90% of the people on the board read the ending back to when she was a kid as her telling Marty to 'stop' sex thus he was the true rapist who drove her to be insane, or something.
I didn't see that at all. I just finished watching this, and that scene to me was not even remotely ambiguous. The movie began with her frolicing around the house pretending to be Jackie Kennedy giving a tour of her house, with someone video taping. So it ends with that same day, and she refers to the camera man as Marty. She was acting normal and stately at first but then this last scene, suddenly she's in a very suggestive position. when he says "you want me to stop?" he was referring to stopping the camera and their little Jackie-Kennedy-giving-a-tour role play. She wanted to stop doing that role play and stop the camera so that they could have sex. She was givnig him that same creepy lustful manipulative psycho look that she would when older too. So it was like...ew creepy, she was a psycho perv even as a kid.
So yeah, interesting that so many people read that scene as her asking him to 'stop' having sex with her? I really don't get how it was interpreted that way lol.