She smiles to herself, at him despite his eyes being closed, when he starts to hum with her and for a moment, they harmonize.
Stilling her hand at his cheek, she lets her forehead rest against his until he drifts off. She gives him a few moments to start dreaming and maybe because he looks so peaceful, finally.

But that's not why they came inside and she centers herself, her mind after a moment, dipping into his mind and wading into whatever dream he's having at the moment, hoping that she can direct it towards some place peaceful.