Sam frowned, momentarily shooting Castiel a concerned look before he leaned forward to examine Margareta a bit more closely. "Hey," he started, giving her the most determined and honest look he could currently muster. It wasn't at it's best, but the look was there. "You're not dying."
Which was a lie. Ruby...Margareta, she obviously did die at one point. Maybe she was already dying now. Sam seriously hoped that she wasn't. But if she was, they'd find a way to cure her.
...but how much would curing her change? How much would keeping her here away from that past of Ruby's change his future?
"You're not dying," Sam repeated, forcing the point a little more firmly. He felt like he was almost trying to convince himself of it now. "We'll take care of you."