Your girlfriend’s sister is a devious minx, openly teasing you with her tight body, and sneaky peeks of her wet, stretchy thongs under her skirt. But she crossed the line when she stopped wearing panties, giving you glimpses of her glistening pussy, right in front of your oblivious girlfriend. You decide to confront her one day and chastise her. But you poor, naive fool - scolding her only makes her pussy wetter.