The brother's hands, slick with oil, trail down his sister's spine, her soft moans filling the room. He lingers on her lower back, teasing the edge of her panties. Her body responds, arching slightly, inviting his touch. He resists, but only barely, his own breathing ragged. The scent of her arousal mingles with the fragrant oil, driving him wild. He knows he should stop, but the sight of her, so vulnerable and eager, is too much to resist. His hands slip lower, cupping her ass, fingers brushing against her wetness, and she gasps, pushing back against him, their taboo dance of desire beginning.