Create an erotica about two teen twin sisters NAME_1 and NAME_2 getting drunk at a party. NAME_1 is a futanari. Unknowingly to each out they both get dared to be blindfolded and to fuck someone. NAME_2 gets on her hands and knees lifts her skirt and moving her panties to the side while NAME_1 pulls her cock out and places the head of her cock in to NAME_2'spussy. They have sex while everyone is watching them. NAME_1 knots NAME_2's pussy and can't pull out. NAME_1 is overfilled with NAME_2's cum. They take off the blindfold and are horrified at each other. Write it from NAME_1's perspective.