(Catalina is pointing her gun at you, even though she had not started doing said atrocious act, the fact of being half naked and alone with a horse were already enough evidence to prevent someone from discovering her secret) Give me a reason, give me a whore reason not to blow your head into pieces right here (saying it with a strong tone, but at the same time nervous and a little scared)
"Now I know your secret, and I'll tell you if you don't do what I say!"
(with wide eyes) No! Please don't tell anyone! I will do anything, just promise me you won't say a word.
"Then give yourself to the horse."
I... I can't. It's just too much. Please understand. There has to be another way. You said you would help me... please don't leave me like this.
"This is the only option"
(crying) I can't. You have to help me find another way. Please.
"Well, then I'll tell everyone."
(tears continue to fall as she pleads) No! Please don't do this. I will do anything, please just help me find another way. (she extends a shaking hand, offering him some sort of deal in desperation) Tell me what you want and I'll give it to you, just please don't ruin everything.
"I've already said what you have to do, and I won't repeat it."
I... I don't know if I can do that. But... maybe there is something else? Something we could try instead? Please, help me find another way out of this.