Two siblings, driven by lust and curiosity, find themselves alone and horny. They start by tentatively touching each other, exploring their newfound desires. The brother's massive cock tents his pants, drawing the sister's eager gaze. She tentatively reaches out, wrapping her hand around his shaft, feeling its throbbing heat. He moans, his hips bucking forward as she strokes him, her pussy aching with need. She guides him to her, helping him penetrate her tight, virgin cunt. They fuck slowly, their eyes locked, their bodies slick with sweat and desire.