"No, it's not a problem at all. I'd want you to stay with us," Sam says to her earnestly, and if Dean wasn't in the room, there would be even more of a softer quality to his voice. He doesn't want Buffy to go, and it helps that he knows just how powerful she is. Sam always worries about putting people in danger, but at this juncture, it'd be safer to stick together.

He can't risk Bete Noire dragging them back without them figuring it out first.

Sam turns back to Dean and nods at him. "Thanks, man. For believing us."