Hector threat, that Jimmy would start cutting throats if she didn't speak… didn't really understand because she was still vomiting, she was still out of her little world as she realized that they truly had fucked up with all of this and now the butcher came to them to collect the debt of them… which is their life.
Second, she knew too very well, as everybody, that even if she spoke they were going to kill all of them, so talking anything about their plan and business would mean nothing, just death… but that's what Hector was genius about.
He didn't threaten her directly, but at the same time he did. He planted that seed in her mind, the idea that if she didn't speak, her little friends who were ready to attack the family one by one, would die in the most brutal way possible, and she would have to watch all of it.
