He hears her coming, but he doesn't look from Rey to Jyn until she takes his hand. He steals a quick glance down at their hands, then turns it into a head tuck to pretend he didn't.

When she starts to pull him, he puts up no real resistance, but he lets himself be dragged along anyway. He's always reluctant to leave Rey, but he knows he can't really stay and watch her all night. Besides, he kind of likes the way Jyn's fingers feel wrapped around his, so maybe any bit of slowness on his part is to get her to keep tugging him along.

"It's the only time she does not like our attention, apparently." Weirdo sleep baby senses.