First notable moment when Lidia breaks from the more respectful, traditional form of address in Spanish, "Usted," when confronted by Doña Carmen in the elevator/lift. By not first asking for permission, she is drastically downgrading the level of respect by addressing Doña Carmen with the much more familiar "tú" form of conversation. To such a high member of elite Spanish society at the time, this would have been quite the insulting shift, a clear threshold crossed that insinuates "the gloves are off."
According to the day of death printed on the funeral program, don Gregorio Díaz, the candidate for mayor, was stabbed to death on May 18, 1931.