She nods slowly, continuing the slow, measured movements of her hand across his back. Something steady and repetitive for him to grasp with his body and mind. Perhaps not as effective as a breathing exercise, but it's a start. Grounding him in the reality in his arms is more important when it seems to help him most.

"Think nothing of it." She frees one hand to rest it on his cheek, letting him have more of her warmth in familiar places. "I would rather be awake with you now than sleeping through this. You're far more important to me." It's not a feeling he can help, but she'll remind him of this every time it happens. Amelia's always been a light and terrible sleeper, and at least if she's awake with him, there's meaning and purpose to it. She'll take that over sleeping soundly any night.

Taking a breath, she leans up to press a kiss to his forehead before returning her own to that spot. "I love you, and I'm here with you. This is where I want to be, no matter the hour. I promise."