As the bell rings signaling the end of another school day, two students, a brother and sister, linger behind, their hearts pounding with a secret they dare not speak. In the silence of the empty classroom, they stand close, their bodies almost touching. The sister, her uniform slightly disheveled, leans in, her breath warm on her brother's neck. "We shouldn't," he whispers, his voice barely audible. But the hunger in his eyes betrays him, and she knows, as she reaches down to stroke his hardness, that they both want this, this forbidden fruit.