I didn't really take her seriously when she said that. I thought she was just mocking Hadley. I might have to watch that scene again...

Tears really aren't that hard to fake. I can do them without feeling anything. (Not a psychopath. Just curious) Someone with a serious arsenal of emotional manipulatory weaponry should be able to master them easily.

ETA: To be fair, sometimes fake-crying does result in a yawning episode instead...