In other words, it definitely doesn't look like Walter and Russell's flat.

Walter doesn't let it bother him. Though, it doesn't really resemble Ben's own tastes...

Walter's immediate reaction is a smile in return.

"I do try," is his response, having put his bike somewhere Ben's aunts (A) won't run it over and (B) will notice if they happen to show up while he's here.

"Nothing more than the expected excitement today?"

Granted, he'd been following the stream, and nothing had looked like it had gone wrong, but that wasn't a certainty.