Noooo... Sandra's not going to be groped by just anyone. Ahahah
The fact is that Sandra in the headmaster's office in one of her thoughts says that she was wrong to confess to the headmaster that she liked Luca.
Ultimately it was a big mistake and so was making a false statement on the video.
But keep in mind that she was afraid that her husband would find out about this from the rumours in the neighbourhood.
And the headmaster promised her that he would silence the rumours, so she compromised.
When she let herself be touched, I admittedly exaggerated to alter the scene to show that the headmaster has ulterior motives with Sandra.
And she didn't say anything because she is in a state of confusion.
But having said that, even if I would like to blackmail her, it won't be from the headmaster or Fausto the basketball boy. But it will be another character and it won't be avoidable because he's part of the story.