Seeing him peek out at her while remaining partially submerged, and seeing the expression on his face (or at least what she can see of his face), helps to further pull her from her own head. Her smile grows, and she finally chuckles. It ends with a heavy sigh - something cathartic, like she's shedding something off instead of letting out a noise of exasperation.

"Alright, you win." Not that there's really any contest going on, but he did make her smile and right now, that counts for a lot. "Let's ... talk about something else."