It's a poor choice of test, because she scoffs in a way that's unreadable: she could be dismissing the tape, or the idea of his decorating, or his taste in posters. (It's his taste in posters; she doesn't think they need more Bigfoot in their lives, okay.) At the very least it's not the awkward silence that would imply he'd greatly overstepped.

(Maybe if he agrees to frames, like a civilized human being.)

"I promise it's more comfortable when it's not on fire." She shoots a look at him, trying to ferret out how he's feeling about all this. An apology for never asking him over is on the tip of her tongue, but she's not sure how to say it-- not sure whether she ought to.