12x10 rewatch: gosh, dean really hates how the “lily and her daughter” story went down in 1901. it probably reminds him of the fact that cas is not human and used to be a real “angel’s angel” back in the day (even if we know he’s always had a tendency to rebellion and compassion, but i dont think dean knows).
dean can’t even look at cas after he knows what happened with lily (well, the “official” story)
(poor sam, always in the middle)
and before that, cas was so afraid of what dean and sam would think of him (but mostly dean).
(all gifs are mine)