To me it looks like she's either getting frustrated/tired by the length of the tour and all the locations she has to show, or increasingly nervous, possibly by increasingly annoyed or disapproving facial reactions from our two heroes.
Or, as mentioned last week, because it's getting more noticeable that in all those locations, no other patrons are visible.
Also, these locations aren't particularly imaginative. For a place that was just boasting of its imagination and how it was their only limit, ...
Though, the last expression could be in response to the suddenly very bothered looks on the guests' faces. She probably has no idea how problematic fashion boutiques have been to them. I mean, how frequently could one expect to have patrons who have been to another fashion boutique with extra-dimensional horrors? I mean, they survived, so those other places clearly were doing something wrong.
Script for this page and Art by Studio Katsumi