Summary:
The speaker tells a detailed story about her marriage, living with her husband, sister, and mother. She discovers her husband's infidelity with her sister, confronts them, and later learns that her mother knew about the affair. She pretends to be her husband's sister to extract information from a waitress, ultimately confirming the affair. The story ends with her emotional turmoil and frustration with her family's betrayal.
Here are the key facts extracted from the text:
1. The narrator and her husband were happily married for six years.
2. The husband had a good relationship with the narrator's family, except for her mother.
3. Financial problems led them to live with the narrator's mother and sister for five months.
4. The husband and the sister started getting along better over time.
5. The narrator discovered her husband cheating with a waitress named Lupita.
6. The narrator pretended to be her husband's sister to gather information from the waitress.
7. The waitress confirmed the relationship between the husband and Lupita.
These are the factual details without opinions or emotions from the text.