Final answer:
The question refers to a specific simile used by a governess to describe the unease between herself and Miles during dinner, but the provided text does not include this simile, making it impossible to answer accurately.
Step-by-step explanation:
The student's question appears to be about a specific simile used by a governess to describe the unease between herself and Miles in a particular literary work. However, there is no direct quote provided from the text that includes the simile in question. From the text snippets given, we can discuss the themes of unease and discomfort, but they do not provide the specific simile the student is asking about. The passages illustrate moments of tension and emotional distress in various dining settings from different literary sources, but none of them include a simile from a governess about her dinner with Miles. As such, without the relevant text or sufficient context, it is not possible to accurately answer the student's question.