Cassian knows that Jyn would have no problem with having Poe stay outside, but only one of them is really feral, so he'll just continue on in the vein of going into the house, through to the kitchen, casting her a short but fond look before turning to the stove and fussing with the kettle.

"Green, black, fruit?" This is to Poe. Jyn is getting something in a yellow box, with a bear in pajamas drawn on it.

For that matter, Cassian will have the same. And wash up the dishes while waiting for the water to get hot.