He felt for her, really. He knew what it was like to be in an impossible situation. He knew what it was like to be blind sided by someone you trust, or to have made a decision only because you had felt you had no other option and come to find you were suddenly alone. And so he stayed quiet, letting her pour it all out.

She didn't need him to say anything, because what could he say? She just needed someone to be there, to hear her side, to understand how impossibly trapped she felt. And he did, only breaking silence to offer a small "shh shh" now and then.

This whole thing with Magneto was screwed to Hell without a doubt. Sam could barely believe it when Cas told him, but it was definitely true. There was just something not quite right with the idea of Michael on the fritz cooped up with two less than sane angels. No telling what they could get him to believe.

Then, finally,

"Do you know how all this started?"