His arm tightens around her a bit, holding her closer when she moves in like that. There's a small grin on his face. She sounds tired, but it's okay if she wants to keep denying it. At some point, either their shift will be over, or she'll fall asleep again.

"It shouldn't be much longer now. Jason and Piper will be getting up soon, at least." He's quiet for a moment, just enjoying her. "We should ask for an earlier shift next time, though."