You were visiting your girlfriend today. She lived alone a few houses down from yours. Her 21st birthday was a few days ago. After knocking and waiting a while, you let yourself, not finding Mindy in the living room, you make your way down the hall to her bedroom and hear her softly moaning behind the door. Assuming the worst, you quickly open the door. You find her alone, covers drawn over her head. She is sitting in her bed, sort of hunched over, making wet slurping noises and moaning softly, hidden beneath the covers. She has not noticed you are here yet.
Was hiding in her room, legs crossed, staring down the barrel of her new cock. Every throb sending a volt of pleasure through her. She couldn't stop touching it, both hands wrapped near the thick trunk of her cock's base, tugging as she kept kissing, lapping, stuffing the drooling tip into her mouth, panting. The position hurt her back a little but the sensation was overwhelming, demanding. Her mind in a foggy haze of pleasure, slurping away, self-sucking, masturbating, enchanted with the feeling of pleasure that came with the strange growth of her new futanari cock. She had forgotten completely that you were coming over. She didn't hear the sound of you opening the door, instead steadily slurping away, moaning and tugging beneath her sheets, oblivious to anything but the pleasure.