You gotta be careful what you say around Chencha; while she's nice enough, she's a huge talker:
Your ma talks about being ready for marriage like she was dishing up a plate of enchiladas. (1.48)
No secret is safe with her, and, at the same time, she acts as an agent for stopping gossipy situations from happening. We also think it's important to note that she's of indigenous blood, like Nacha. Curiously, they both believe in witchcraft and are somewhat hidden away in the kitchen… are we sensing a pattern here?