Unlike a man's, it never goes limp and can perform infinite stretching movements: the 'piston dildo.' The brother targets his sister who is in her pubescent years and curious about sex, placing piston dildos around her room. Initially, she shows disgust upon finding them, but her curiosity gradually grows, leading her to use them. Tentatively inserting it into her vagina and turning on the switch, an unprecedented sensation pierces through her brain. As mentioned, this machine that never tires relentlessly pounds her cervix, making her climax repeatedly. Sometimes, when removed, the dildo is covered in a thick, white fluid. Witness these young sisters becoming captives of intense pleasure.
