Penny finally understood the situation at that point—Charlie far outclassed her, and even fleeing was delusional.
While she couldn't understand how Charlie had fabricated a video of her in no time at all, she had a feeling that it would be taken for concrete evidence if it was ever released, and her family would be massacred in retaliation.
As such, her only option was to do what Charlie asked and avoid bringing trouble to her family.
Seeing that she was conceding, Charlie nodded and pockete