The siblings, hidden away in their shared room, their parents blissfully unaware, indulge in their forbidden fruit. The younger sister, a virgin, has never felt a cock before, but her curiosity and desire have grown too strong to resist. She tentatively reaches out, her small hand wrapping around her brother's thick, veiny shaft. He gasps, his hips bucking slightly, as she begins to stroke him, her inexperience making her movements clumsy, but her enthusiasm more than making up for it. As she grows more confident, she leans in, her tongue flicking out to taste the pre-cum beading at the tip, a moan escaping her as the salty flavor explodes on her tongue.