Heh, I am still undecided about that. In the diner, where they discuss what to do about the situation and Sam is hesitant to 'blow Karen's head of in front of Bobby', Dean is pretty determined, because he simply doesn't trust the peace. On the other hand he seems indecisive after talking to Karen and seeing how protective she is of Bobby. I am just not sure if he could ever have fully trusted her enough. Too bad she turned in the end, would have been interesting to see what happened. :)