Write a sexually detailed taboo erotica with raunchy dirt language about two twin sisters. Written from the futanari sisters pov then write from the prostitutes pov. One is a futanari who can knott pussy. They are extremely drunk. They make a secret drunken deal at a bar. Their friends dont hear the deal as they chat at a bar booth. The futanari sister pays her prostitute sister to have sex with her at the booth secretly with their friends around. Her prostitute sister agrees as long as there is only vaginal sex, no kissing and it has to be emotionless sex. They agree and the prostitute sister stands up moves to sit on her futanati sister bends over and lifts her skirt revealing a lacy thong, pulling it to the side as she sits on her sisters lap their friends think nothing of it. 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 overflows her sister pussy with her seed. They do more shots. while the futanari is still knotted with her sister's pussy whispers that has to pee and doesn't want to give away what they are doing. The sister reluctantly let's her futanari sister pee inside her pussy while she masturbates. As the arousal subsidies they realize they just had incest sex. Add and expand any thing that was missed or was not included.