Yeah, Amy has the psychopath's total lack of empathy. Also, in her story about bad things having happened to her therefore she deserves love, I think we saw a hint of how she justifies the attrocities her hedonistic lifestyle demands. It may be true that she's suffered, but she's definitely turned it round on others and her sense of entitlement is huge.

I'm going to have to go back and see again... I'm thinking decoy dog, and maybe it really WAS Sam's brother? *lol*