Dean noticed how she eventually had fallen asleep, guessing she hadn't slept well the night before, or was still tired from all that happened. Either way Dean felt bad, knowing that she could never have the 'apple pie' life like so many people in this world. 

Dean listened as he voiced his opinion about themselves and Evie. He was preaching to the world on his like he was been thinking about this whole time. "I know, I know. I don't want this for her either. But what else can we do? What do you think would happen if she didn't end up with us?  She most likely be dead or something." Dean explained. "I don't like it either. But we made a promise to her former guardian. At least we can do is make sure she's protected and has the means to. It's hard for me too Sam, trust me when I say she's too young for this. But her name makes her an enemy for many and a huge target. That's why I want to go see Bobby. See what can be done while she's with us." Dean finished.