Aroused stepbrother discovers stepsister's explicit viewing habits and engages in sexual activity

After a long day at work, a young man enters his sister's room and discovers some explicit material on her computer. Instead of being upset, he becomes aroused and decides to join in on the fun. He approaches her, his intentions clear, and she doesn't hesitate to reciprocate. They quickly escalate their foreplay, with him teasing her nipples and her touching herself. He undresses her, revealing her ample bosom and luscious ass. He eagerly takes her from behind, his hands exploring her curves as he thrusts into her. The exchange becomes more fervent, with her taking control and riding him. The encounter reaches its climax, with him finishing in a powerful explosion onto her backside. The encounter leaves them both thoroughly satisfied, their shared experience solidified by the lingering taste of his seed on her skin.