Dawson Miller stands under the cascading water, his taut muscles glistening as he lathers soap onto his hard, throbbing cock. The steam fills the room, making his breath visible as he strokes himself, lost in a fantasy world. Suddenly, the shower curtain pulls back, revealing April, his stepsister, who had been watching him through the frosted glass. She licks her lips, her eyes fixed on his massive erection, and steps into the shower, eager to join him in his sinful pleasure.