Answer:
The narrator’s aunt is inappropriately dressed.
Step-by-step explanation:
From the eyes of the narrator, their aunt is wearing an unpleasant outfit most probably provided by a "country dressmaker". This issue is addresed in the entirety of the excerpt.
The narrator's negative opinion is especially evidenced with their sentence "she wore a black stuff dress whose ornamentation showed that she had surrendered herself unquestioningly into the hands of a country dressmaker", which shows what little value is found within a country dressmaker's work form their prespective.