Knowing that nothing she would say could save her from the judgement she stays quiet. They will torture her to get names of other 'witches' but she's not going to give death sentences for innocent people. She herself is guilty, which no one of her imprisoners really knows.
In the old times many women were killed for exercising witchery. Most of them were innocent but probably there was also some real ones. In a culture where everyone was hitting each other, some people were twisted and many torturers really liked what they were doing. I emphasize that their victoms, like this girl here, didn't like what hapenned to them and they were no masochists.
Looked in the mirror for a model but used imagination for details.