Sam definitely does not want to drive around with a demon in the backseat. That said, apparently, Dean isn't as worried.
Sam thinks his judgement might be a bit impaired by the fact that he was the one who turned the girl into a demon into the first place. Not that Sam has any right to judge—hello, Ruby. It's because of this that Sam doesn't say anything.
The inside of the car is filled with an extremely awkward air. Nobody is talking—Dean is driving with short, jerky motions, not at all his usual smooth self, Sam himself just sits straight and isn't looking at Dean or Annie, and Annie…
Annie is humming. What the hell?
Sam glances at the rearview mirror. Her lips are moving—she is humming. The song seems familiar too—like something Dean would like. Annie notices Sam's eyes reflected at her in the mirror and gives a little wave. Sam looks away.
She has Dean's music taste. Really, the way she acts, Sam could almost forget she was a demon in the first place.
She wasn't like Ruby at all. With Ruby, Sam had been jarringly aware she was a demon—though her words had shown she was ashamed of her demonhood, her actions had shown pride in it. She held herself high, mockingly called him racist when he brought it up.
And of course, there had been the moment after Sam had killed Lilith. It was the most obvious then—she had never really hated being a demon—she had been worshipful of Lucifer like every other demon. Sam had looked back on that moment and wondered how he'd been so blind—what exactly had he gone to Stanford for, again?
Annie, on the other hand, doesn't even seem to notice she is a demon. She plays with her hair—not hers, Sam reminds himself, her meatsuit's—she taps her finger to some beat only known to her on her knee. She has a pink purse—a cellphone in her pocket. She doesn't seem to care, either way, demon or human.
Sam is pulled away from his thoughts when Dean speaks up.
"Who's the meatsuit?" He says, in a gruff voice.
Annie stops twirling her hair and meets his eyes through the mirror.
"My comatose twin sister," she says, smirking. Sam blinks in surprise. Comatose meatsuit? Wait, back up. Twin sister?
"W-what?" Dean actually stutters. Sam doesn't blame him.
Annie rolls her meatsuit's eyes. "Hello, I was human? And I didn't die that long ago. My dad put my sister in a coma about a week before I died—I'd already sold my soul, so I couldn't deal twice. Pretty sure her soul's already in Heaven anyway."
Sam can't even get shocked anymore. He actually finds himself wondering if they can really trust Annie.
But Ruby, his mind all but screams. But Ruby had never spoken of her family, had she? She probably hadn't even remembered them—Sam had remembered her saying that she was a witch when she was human. She'd thought of Lucifer as her God and other demons as competition.
Maybe all demons aren't pro-Lucifer.