Is Rosa scared of El Patron? One piece of evidence please.

We come to find that Rosa is extremely frightened of El Patron, particularly after her treatment of Matt is exposed.

“You knew about it, Willum,” cried Rosa. “You didn’t tell me it was wrong.”
“I knew nothing about it until today,” said the doctor.
“You’re lying! Tell them, Willum! You thought it was funny. You said the beast—the boy—was in good condition!”
“She’s suffering from delusions,” the doctor told El Patrón. “It’s a shame such an unstable individual was allowed to have a position of responsibility.”
Rosa flew at the doctor and raked his face with her nails before he was able to grasp her wrists. She kicked and screamed, driving Willum back with the force of her rage.