The song finishes, and those few moments of quiet have Rey letting out a few more wails. "Rey, Rey, Rey, hush now, you must be so tired." He whispers into her ear, kisses her head, then starts singing again.

It settles her, just not enough to sleep. He paces tiredly with his daughter, rubbing her back and singing softly in Fest. He catches a glimpse of Jyn watching them from the doorway and feels caught; his ears go red, but he doesn't dare stop when it's the only thing keeping Rey's sobbing to a lower murmur. She hiccups against his chest, fussing and incredibly unhappy and Cassian is at an utter loss. His heart hurts, because it seems like he can't do anything right tonight with the two people most important to him.