The creaking floorboards betray their presence as the siblings tiptoe towards each other's rooms, hearts pounding in anticipation of the forbidden. The girl, her young body barely concealed in a thin nightgown, leads the way, her brother following close behind, his eyes locked on her swaying hips. Once inside, they waste no time, their hands exploring each other's bodies with a hunger that belies their years. The girl gasps as her brother's fingers find her wetness, while he groans at the feel of her small hand wrapped around his throbbing cock. Their bodies move in sync, their teenage hormones driving them towards a release that will change everything.