There weren't many things that could break Sam Winchester anymore. He'd been tortured. Brutalized. Beaten down. He had literally been to hell and back. But the sound of Jessica's sob was enough to metaphorically bring him to his knees.
She repeated his name and he looked back at her, wishing there was something he could do to make any of it okay. At a loss for words, Sam pulled her into a tight embrace. He wasn't sure if she'd ever want him to touch her again. He couldn't blame her. He'd lied to her. Kept things from her. Gotten her killed. She had every right to be furious at him for the rest of her life.
He'd learn to be okay with that, if that's what she needed. But in that moment, he just wanted her to know that he was here for her if she wanted him.