Cassian tries to recall if he's heard Jyn laugh before this and realizes he doesn't think he has. Certainly, he's never heard a startled, unfettered laugh like this one from her before. It's a good, clear sound and lacks the weight of her usual hurts and sarcasm. He thinks that if he closes his eyes, he might actually be able to forget the reality of who they are for just a second and just be.

Jyn's hand is light on his chest, folded between them, and his arm still lays across her bodies. They face each other and keep their backs to the world, to outsiders who cannot possibly comprehend what it means to be them. But she's here and she understands and that means enough for the time being.

In the background, he hears the patient go into cardiac arrest, presumably because the doctors' passions have gotten the best of them and they are consummating their love on top of the poor fellow's unconscious body. "Those don't seem like good doctors."