In the dimly lit room, the siblings' hands roam, tracing forbidden paths. She guides his hand between her legs, her breath hitching as he touches her wetness. He explores her tight, virgin slit, his thumb circling her clit, making her gasp. She reaches for his growing bulge, rubbing it through his pants before unleashing his throbbing cock, her small hand barely able to wrap around it. They learn each other's bodies, their hands slick with desire, their hearts pounding with taboo excitement.