This is my big problem with this episode, especially after 7.03. Lucky killed 3 people and the threats to his family weren't deadly. Yet Dean just lets him go. Plus I found Lucky incredibly creepy. He watches the mother shower and walk around in her underwear (or less, only the dog is around after all), sleeps with her at night all without her knowing that he is human. AND this is all done after LFOTH where Dean is very specific that the vampire watching the sleeping girl is kind of rapey. What Lucky does is even more rapey and yet Dean and we are supposed to view him with sympathy. I did feel for Amy. I understand the idea that the last years have burned away any sympathy Dean has ever felt for monsters, but Lucky was an imminent threat to other families and should have been put down.