Oh. [Vash is surprised to hear that is how Knives sees his room as. He had assumed that his brother would just barge in as he pleased. Vash hadn't considered the space truly as his own and more as space Knives was allowing, for the moment, him to use.

Now he feels bad about that joke diary he hid in his room that just says: don't read my stuff Knives!]

Well, I mean, right now is different. It's not like you're taking my space away. I'm inviting you to use it while I use yours. You're just using the bed. You're not going to be going through my stuff or anything.