Create an erotic narrative that is both tantalizing and taboo. Its about two twin angel futanari sisters. They find a succubus an use her against her will and a sex toy. One sister should slip her cock in to the succubus pussy. The other sister trys to slip her cock in to the succubus asshole but accidentally slipped it in the pussy of the succubus, joining her sisters cock in the succubus pussy. They realize that the succubus could be bred for an heir. They fuck and cum in the succubus knotting her pussy with both cocks. The succubus is desperate to get away but can't. The sisters realize they have to piss in order to release thier knots from the succubus 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