There's still part of her that doesn't entirely believe this is real. It's so quiet, just night noises, all so distant and not a part of this, that they could be the only people here. In a way, Meredith thinks, he was right, because this was there all along and she never knew, she never guessed, but she's not sure that actually means the same thing he thinks it does. The thing is, when something goes wrong, he's the one she runs to now. Something's gone wrong, so she reaches over, holding onto his wrist, in desperate need of something to keep her anchored. Whatever he's done or not done, maybe it just hasn't sunk in yet, but that's still him. Maybe that's what decides for her, even when she's not quite conscious of having made a decision, still unsettled and a little lost. "I don't know either," she says. "But I know you. I know you. And I'm not leaving."