Fred stared at Dean for a moment. Her mind was working through the numbers; the odds were really against it, but then she started to factor in where they were, what she'd seen, just exactly how this reality worked. She leaned toward him and sniffed; yeah, there was that smell too.

"This is gonna sound like a really weird question, but you wouldn't be Sam's brother?" Yes, she knew it was a crazy question. "I mean the odds of you being Sam's brother, the Sam I know, are actually not as large as you'd think. Reality is a little strange here."