When Bash disappears, Keith is left with a deer in headlights look on his face, trying to push down the nerves enough to be social and resorting to balancing himself first on one foot then the other like a weird emo flamingo to remove his boots. "You don't have to change. It's your house, I'm the one that's--" That's what? The interloper? Invading? Visiting? He's not entirely sure how to finish the sentence, so he lets it drop, setting his boots aside.

He's eternally grateful when Jeff gives him the subject change so he doesn't have to try to fumble for a finish. "Keith." And this is the part where he fumbles anyway, completely misinterpreting things as he shoves his hands in his pockets, thinking that Jeff is afraid he's trying to move in on his territory. "Look, I have a contract, even if it was just a matter of convenience to keep me out of trouble, but I fucked something up at the library, and I promised Bash I'd make it up to him however he wanted, and this is what he asked for, so... I promise I'm not out to steal him away from you or anything, so you don't have to worry about that."

Lay everything out on the table so that there's no surprises or worries or potential for anything weird. At least, that was his intention anyway.