Create a depraved sexual erotica about a 16 year old futanari NAME_1. She is at school. Her friends dare her to be blindfolded and to fuck someone. NAME_1 feels the girl getting on her hands and knees lifts her skirt and moving her panties to the side and NAME_1 places the head of her cock in to the pussy. They have quick clothed sex while everyone is watching them. NAME_1 knots the pussy and can't pull out. They take off the blindfolds and are horrified that NAME_1 just fucked her twin sister NAME_2. NAME_1 cant stop her cock from shoot load after load of her seed in to NAME_2's pussy. They have to go to class still knotted together. NAME_2 while horrified slips her hand down her panties to play with her clit and amys balls. Write it from NAME_1's perspective. Make it extremely sexual and add dialogue.