A filthy tale of step-Mother's taboo perversion, step-Son's devotion, and step-Sister's innocence. Unknown to step-Sister that her own step-mother is planning all of this, step-Mother guides step-Son through making moves on his step-sister and taking her innocence. Driven by her own fantasies, step-Mother keeps pushing for more. Driven by his deep devotion, step-Son is willing to do anything for his step-mother. step-Mother asks step-Son how it went last night. She wants to know if step-Son was able to make progress with his step-sister. To step-Mother's delight, step-Son made a move and it worked. step-Son tells step-Mother how step-Sister flashed him, then they made out. step-Mother wants to hear more. She wants step-Son to describe it to her in detail. Hearing the details of her step-son touching his own step-sister stirs something deep inside of step-Mother. She needs to have her step-son inside of her pussy right now, as she imagines her step-son describing and admiring his step-sister's perky breasts. step-Mother pushes for more. She tells step-Son that next time he makes a move, she wants his step-sister's mouth around his cock. step-Mother wants step-Son to cum on his step-sister's face. Shocked and excited, step-Son agrees. The next stage of the plan works, and step-Sister sucks her step-brother's cock for the first time. step-Mother wants the details again. Her fantasies coming to life, she wants to reenact the events. step-Mother eagerly sucks step-Son's cock as he describes the dirty details that just took place between her own step-son and step-daughter. step-Son cums on his step-mother's face, like he had just done with his own step-sister. step-Mother tells step-Son go further. She wants to cross the next unforgiveable line. She tells step-Son that she wants him to penetrate step-Sister and cum inside of her. Initially, step-Sister is reluctant to have sex for the first time, especially on step-Mother's bed! Though she figures the best step-son to take that final part of her innocence would be her step-brother. Besides, something about all of this makes it hard to resist. She gives in, showing her step-brother her virgin pussy just before he turns her around and takes her from behind. step-Sister cums hard for the first time on her step-brother's cock. He returns the favor by shooting his cum deep inside of her pussy, claiming his step-sister's virginity right there on their step-mother's bed. Little did step-Sister realize that this is what step-Mother wanted all along.