The creaking floorboards and the muffled voices from downstairs barely register as the two sisters, cloaked in the dim glow of their shared nightlight, lose themselves in each other's arms. Their hands, once chaste and pure, now roam freely, caressing and squeezing, igniting a fire that burns away the remnants of their innocence. They gasp and moan, their bodies writhing as they indulge in their first forbidden fruits, their tongues entwined and their breaths coming in ragged gasps.