Their bodies press together, barely contained in the closet's tight quarters. The sister, her piety faltering, grinds against her brother, feeling his hardness through their thin clothes. He responds, his hands roaming her curves, cupping her breasts, squeezing her ass. She moans, her breath coming in short gasps, her panties growing damp with her arousal. He slips a hand under her skirt, finding her wetness, teasing her clit. She shamelessly rides his fingers, her hips moving in rhythm with his strokes, until they're both lost in their forbidden dance of desire.