Where K's from isn't what anyone would consider nice, either, but for some reason he has a desire to share it with Viktor all the same. Maybe it's a desire to include Viktor in his old life so that Viktor might better understand him, and maybe he also misses the familiarity of the place...

"Agreed on all counts. And let's go to bed then."

Cleaning up after Adele's meal can wait until later. He takes Viktor by the hand and leads him to the bedroom, where he decides to get dressed for bed in flannel sleep pants and a shirt. Even if they won't be sleeping, there's no reason why they shouldn't be comfortable. Turning to look at Viktor, he asks, "Would you like some clothes?"