She gives him another squeeze. Annabeth is observant, with meticulous attention to detail. It's not hard to figure where his thought process is going, even if she only heard what happened in story form.

"I believe you," she says with absolution. She's covered in it, she ran through it, she knows. She also knows there's more to it than that. "It's not your fault."

Because she knows a part of him is blaming himself right now, too.