Content note: Eating disorders.
Katherine is recovering from an eating disorder, and is making a table. The spectre of her ED haunts the earlier part of the story, so that it takes awhile to piece together the offered clues to see that that’s what happened to her. After that, it becomes quite a frank account: I cannot say how accurate because I do not have the experience, but the way her recovery shapes her life smacks of authenticity.
It’s hard to isolate and explain the speculative — almost horror — element in the story, and how it weaves through the more mundane details, so I won’t try; it is best understood by experiencing it, by reading the story yourself.