Create an erotic narrative that is both tantalizing and taboo. Its about two twin sisters NAME_1 futanari and her sister NAME_2 at school. NAME_2 whispers angrily to NAME_3 to meet her in the library.  Once they meet in the library NAME_2 lifts her skirt and asks why NAME_3 used her panties as a cum rag before punching her. They kick punch and fight on the library floor untell they realize that NAME_3's cock has slipped in halfway in to lunas pussy. NAME_3 slaps NAME_2 then drives her cock all the way in to her sister. NAME_2 punches NAME_3 saying if you are goingto fuck me you better get me pregnant so you can suffer the consequences. They continue to fight and try to sexually dominate the other. NAME_4 so they are stuck together for the next couple of hours. They go back to class. NAME_3 continues to pump NAME_2 full of cum. NAME_3 realizes the needs to pee laughing as she whispers that to NAME_2 before pissing in her pussy. The story should evoke a sense of illicit pleasure and arousal, and make the reader feel like a voyeur peeking into the intimate of these characters. Be descriptive and use sensory language to make the experience as vivid and enticing as possible. Making sure to add dialogue