In the quiet of their shared home, a brother retreats to his room, his mind filled with thoughts of his step sister. He leans back on his bed, unzipping his pants to reveal his throbbing cock. Slowly, he begins to stroke, his breath hitching as he imagines her touch. His hand moves faster, his grip tighter, until he feels the familiar warmth of release. He looks down at the mess he's made, a satisfied grin on his face, knowing she's just a room away.