My stepbrother, who was born when my mother remarried, was a total perverted pedophile! My sister was raped when the family wasn't looking, and was threatened into doing what my stepbrother told her to do. Regardless of whether the family was nearby, he thrusts a dick into her mouth, makes her live with a vibrator inside her pussy, and trains her to his liking. And even though my sister feels disgusted by the pleasure her stepbrother forcibly gives her, her body still craves him...