A horny teen boy, driven by his raging hormones, can't help but give in to the temptation of self-pleasure. He sneaks into the bathroom, hoping to go unnoticed by his sister. As he starts to stroke his stiff cock, he hears her moving around outside the door. The thrill of the potential discovery only serves to heighten his arousal. He bites his lip, trying to stay quiet as he jerks off, his body trembling with the effort to maintain his composure. Just as he's about to cum, he hears the door handle turn, and quickly tries to clean up, leaving him with a frustrated, aching cock.