The stepbrother and stepsister wake up in their shared bed. They're both tired, but the stepbrother can't seem to shake his morning wood. He tries to ignore it, but it continues to grow. The stepsister notices and teases him about it, asking if he has a new girlfriend that he's thinking about all the time. This only serves to make his arousal worse.
Later that day, the stepsister comes home from college wearing a tight-fitting dress that hugs her curves. The stepbrother can't help but stare at her ass and tits as she walks by. He follows her into her room, where she changes into another outfit. He gets a clear view of her perfect body as she takes off her clothes and puts on a tiny bikini. His arousal reaches its peak.
Later that night, the stepbro His arousal reaches its peak, and he joins his stepsister in her bed under the covers; their bodies gradually finding a rhythm as they make passionate love throughout the night.