John nods, thinking of Karen, of how difficult it would be to lose her. He would survive. He's survived losses just as painful as he knows that would be. But he would be undeniably changed. Just as his father's death had changed him, and Jessica's, and Carter's. As losing Shaw had changed him. Losing Finch.

He wouldn't be John Reese as these people know him now.

"Sometimes I want to ask Karen if it's something she wants," he admits. "But what if she says yes and then I can't give it to her?"