In a tantalizing turn of events, the stepsister decided to take matters into her own hands. She had been watching her stepbrother from a distance, observing his every move. Finally, she couldn't resist any longer and decided to approach him. As she got closer, she could feel her heart racing. She had never done anything like this before, but the desire to please her stepbrother was overwhelming. She knelt down in front of him, her eyes locked on his throbbing manhood. With a firm grip, she began to stroke him, her hands moving up and down his shaft. The sensation was overwhelming, and she could feel her own arousal growing. As he reached his climax, he released his load all over her face. The sight of her, covered in his essence, was a sight to behold. She smiled, knowing that she had just crossed a line she had never dared to before.