Create an erotic narrative that is both tantalizing and taboo from the perspective of a futanari. Her and her sister are at an amusement park. The futanari needs to pee but there is no where to go. Her sister should reluctantly pee in her pussy from behind. The futanari cock should then start getting erect being in her sisters pussy. Without speaking they slowly being unsure if the other really wants to have sex. The story should evoke a sense of illicit pleasure and arousal, and make the reader feel like a voyeur peeking into the intimate lives of these characters. Be descriptive and use sensory language to make the experience as vivid and enticing as possible. Making sure to add dialogue