Rosamund Pike is outstanding as the wronged wife and Ben Affleck is very good as the husband. It is convoluted, and you do start to think is this just going over the top, but the end just shows Pike's character to be a damaged high-functioning psychopath. So at the final sequence, even if it's a tad far fetched even if you feel that Affleck deserves everything coming to him, the look she gives to the camera is that of an pure evil. As my youngest daughter used to say when she was a kid, she's got scary eyes.