In the dim light of the closet, the siblings' eyes meet, and the unspoken tension between them snaps. The girl, her face flushed with desire, reaches out to stroke her brother's cock, now rock-hard and straining against his pants. He moans softly, his hips bucking forward as she expertly works his length. She can feel the heat of his body, the tension in his muscles as he fights to control himself. But it's no use. With a final, desperate groan, he comes undone, his cock pulsing as he spills his load into her waiting mouth.