Peter frowned deeply at the shakiness of Nathan's voice. He'd never heard his brother sound that broken, and it cut him deeply. He swallowed heavily and hesitated a moment before carefully moving forward a step. Just one step.
"The one from the future where I blew up." he said quietly. "Scarred Peter. The nice one. I'm sorry, I don't mean to bother you, I just. . .I wanted to check up on you."