Final answer:
The provided texts do not explicitly detail how Sis reacts to the sun parlor, thus an accurate description of her reaction and its oddness cannot be ascertained without additional context.
Step-by-step explanation:
How Sis reacts to the sun parlor is not explicitly provided in the given texts. However, the excerpts you've shared suggest a focus on changing perceptions, possibly reactions to specific settings or environments such as a sun parlor, but do not provide concrete details about Sis's behavior or feelings towards it. It is necessary to have more context or the specific passage in question to accurately describe Sis's reaction and why it may be considered odd.