A brother's secret pleasure is almost exposed as he jerks off in the bathroom, his big dick throbbing in his hand. The sound of approaching footsteps sends him into a panic, but the door remains shut. His heart races as he imagines his sister catching him, her eyes widening at the sight of his hard, veiny cock. The thought of her reaction pushes him over the edge. With a stifled groan, he strokes his cock one last time, unleashing a huge load of cum that spills out, dripping down his shaft and onto the tiled floor.