Write a sexually detailed taboo erotica about two twin sisters. One is a futanari who can knott pussy. The futanari sister pays her prostitute sister to have sex. Her prostitute sister agrees as long as there is no touching other places on her body, no kissing and it has to be emotionless sex. They agree and the prostitute bends over and lifts her skirt revealing a lacy thong. The futanari slide her dick in to her semi unwilling sister. The futanari dick Knots her sister's pussy and can't pull out. The futanari over fills her sister pussy with her seed. while the futanari is still knotted with her sister's pussy she has to pee. The sister reluctantly let's her futanari sister pee inside her pussy while she masturbates. 