He had spilled so many tears over the death of his brother. He wasn't about to lose anymore to a woman who had broke through the veil and straight into the one memory he had wanted to protect the most from the world. Jaw hardening, he stiffened when Elisabeth hurled herself at him. He didn't shove her away. He merely stared off past her, his mind still going over how fresh the memory actually still was. Dean was back, sure enough, but he had been dead for a real long time before they had been reunited. Sam had spent so much time away from his big brother. So much more than he ever could have wanted.
"You shouldn't have seen that," he said quietly, finally attempting to pry himself away from Elisabeth. He turned his gaze back down toward the ground. "No one should see that." His eyes fell onto the pebble. It wasn't in the same spot. It had moved a few feet past them both and into the grass. Had he kicked it? Nudged it with his foot on accident? Sam couldn't quite remember.