He smiles when she calls Rey button, having never heard Jyn use it before. It's a satisfying answer; he'd mostly offered because he was worried Jyn was still tired and he still wanted to give her a break.

Cassian doesn't even need to stand up to pass over Rey, settling her easily in Jyn's arms. She makes another noise at the transfer, and he leans in to kiss her forehead again. Rey flails her little arms and huffs.

"Let me know if you want me to come take her, when she's finished." She probably won't, but he offers anyway. "Time to get nice and clean, Rey. Be good for your mama."