The siblings, both fresh-faced and innocent, are trapped together in a small space, their bodies pressed close. The girl, her heart pounding, can feel her brother's erection pressing against her. She's never been with a man, but her body responds to his, her nipples hardening, her pussy throbbing. She looks up at him, her eyes filled with a mixture of fear and desire. He leans down, his lips meeting hers in a tentative, clumsy kiss. Their tongues explore each other's mouths, their hands roaming over each other's bodies, learning, discovering.