Final answer:
Walter is upset with his wife's reaction because she does not show the support or enthusiasm for his plan that he was hoping for, revealing a discrepancy in their values or priorities and adding to the themes of miscommunication and disappointment.
Step-by-step explanation:
Walter's upset with his wife's reaction to the plan primarily because it seems that she does not show the level of enthusiasm or support he expects.
In the context of literature and character analysis, when a character like Walter has a grand plan or idea that they are passionate about, they generally seek the support and understanding of their close ones, especially their spouse.
The upset comes from a place of emotional conflict where the plan's importance to Walter is not mirrored in his wife's reaction, indicating a disconnect or lack of alignment in their values or priorities.
Such scenarios in literature underscore themes of miscommunication, disappointment, or differing goals within interpersonal relationships.