Stepbrother caught pleasuring himself with stepsister's videos

Our protagonist, a young man, has a rather unusual fetish. He's attracted to the shape of his stepsister's butt, and he's not shy about indulging in this fantasy. One day, he's caught in the act by his stepbrother, who is quick to confront him about his strange behavior. However, the stepbrother is taken aback when the young man reveals that he's been pleasuring himself with his stepsister's videos. The stepbrother, intrigued by this revelation, decides to join in on the fun. He watches as the young man mounts the stepsister's back, her ass bouncing with every thrust. As the room fills with the sounds of their lovemaking, the young man reaches his climax, filling the stepsister's pussy with his hot cum. The stepbrother, thoroughly satisfied by the encounter, leaves the room, leaving the young man alone with his stepsister to clean up the mess.