Kristen Stewart has been trying to spin this whole affair story as one that was just a one time thing and there was never sex and it was harmless. Not so says Rupert Sanders' brother-in-law who says the affair lasted for months. In my blind item, which I need to dig out, Kristen had sex with Rupert before even getting the part. Of course it went on during the shooting and then it took a break and started up again when they went on the press tour which is when they got busted. The brother-in-law said it continued on through the post production period, but I don't know about that. They might have hooked up during that period, but she was busy on other things and it would have been infrequent hookups.