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Rin has taught his big sister that in addition to being his cum dumpster , his big sister was also his urinal. Whenever Rin needed to piss, he just whispered to Sae. She would just pout and grumble but her body was very obedient, immediately kneeling down and placing her face on the floor, lifting her butt up. Rin felt sorry for his big sister and let her place her face on his cotton slippers instead of on the cold floor. Sae knew that her slutty pussy was about to be pee-filled, so she was already wet, the small hole willingly opened as if it couldn't wait. Rin laughed and used his hand to slap Sae's pussy, this was his hobby, a slightly swollen pussy would be warmer, and more comfortable to put his dick in. Normally, if he peed while fucking Sae, her pussy would already be pounded swollen so there was no need to hit it, otherwise he had to slap her pussy until it was puffy enough. Sae was very indulgent, knowing that Rin liked it, she never refused. Sae bited Rin's cotton slippers and moaned while still raising her waist up and letting Rin abuse her beautiful pussy. Sae's pussy was as wet as a broken faucet, after a few hits, her juice was flowing. Rin also got creative, sometimes using a newspaper to hit, sometimes using a slippers to slap, there was no need to dirty his hands. Sae was both in pain and pleasure but didn't dare to get ahead of herself, afraid that if she accidentally climax and let even a single drop of Rin's cum that was brewing in her pussy fall out, then Rin would definitely slap her pussy until it was burning. After all, pussy spanking wasn't for Sae's pleasure, but to warm her pussy so it would be easier for Rin to piss inside.
"Rin... that's enough~ my pussy is wet and warm~~just quickly pee in~~~"
Rin said nothing and slapped her pussy hard on the face. Sae was so horny that she twitched, realizing that she had misspoken, and immediately apologized.
“Ah~~ sorry~ please pee in my pussy~ the urinal is ready to serve master Rin~”
Rin hummed in satisfaction, then he pushed his cock into his big sister’s wet pussy and started to piss. Peeing in Sae’s pussy was indeed the most comfortable, Rin felt like his cock was being massaged by hundreds of small mouths, warm and soft. The sizzling sound of pee and the intense hot water column poured straight into Sae’s uterus, Sae was humiliated and trembled, her legs were unsteady, Rin grabbed her waist and held her down, like a passive urinal for her little brother to pee into.
“Hot… so hot… you’re going to ruin my pussy…”
After Rin finished peeing, Sae’s belly was already swollen, Rin even teased and pressed on Sae’s clitoris as if he was pressing to flush. And indeed, with one press, Sae’s pussy automatically squirted out the sweet juice, no different from a real urinal.
If that day her little brother had been kind enough to stuff his underwear into her pussy to block the pee, Sae could have continued doing other things. Otherwise, she would have to continue kneeling with her ass up until all the urine was absorbed into her pussy. Rin hated it the most when Sae leaked his urine.
Before, Sae only let Rin pee in her pussy during sex or when they are in the bathroom, but Rin became more and more needy, gradually, wherever Rin needed to take a piss, Sae had to kneel and spread her pussy open for Rin to relieve himself. There were days when Rin peed in Sae's pussy right in the living room, letting Sae kneel with her ass up towards the main door. If their parents had suddenly come home and opened the door, they would have seen their eldest daughter kneeling with her face down ass up, pussy dripping with cum, her belly bulging with urine, more slutty than a whore.
Even when Sae needed to hold that position, she is not free. Rin told his big sister to use her breasts to warm his legs while he watched horror movies. So Sae obediently placed her soft cow tits on her younger brother's legs, using her hands to massage Rin feet with her tits while still raising her waist to let all the urine flow into her uterus. Rin also placed his snacks on Sae's butt, making his older sister struggle to keep her balance. Serving a difficult younger brother like Rin was really hard.
By the time Rin finished watching the movie, Sae was already exhausted. Luckily, her pussy had worked hard so she had sucked all the pee. Finally, Sae could change positions. Sae lazily lay straight on the floor, rubbing her tired waist, frowning and glancing at her younger brother as if she was complaining. Rin was even more excited when his older sister glanced at him. He loved his older sister to the point of madness. Every gesture Sae made towards him made his cock hard. Sae looked at Rin's darkening eyes and knew that her perverted younger brother was about to go feral. Thinking about it made her pussy sore, so she immediately didn't dare to make a sound, instead actively distracting him. Sae lifted Rin's legs and let them step on her big breasts. Her two cow tits were as plump as mochi cakes, the feeling was very good. Rin is now 16 years old and has entered puberty, and is also a soccer player, so his legs are as hard as rocks, extremely powerful. Sae is as soft as a mop, if Rin intentionally uses force, Sae will definitely be trampled and suffocated. Rin played with Sae’s tits like he is kneading a dough. Ever since they decided to have a relationship, except when going out, at home with Rin, Sae is never allowed to wear a bra, her breasts must always be naked so her younger brother can reach into her shirt and squeeze them. When Rin was tired of playing with Sae's breasts, one leg started to wander down to her stomach and then down to Sae's pussy. Sae wanted to close her thighs but Rin forced her to open them like a frog. Her pussy was split open, pink and dripping with juice, Rin happily stepped on it, and even uses his toes to play with Sae’s clitoris.
"Let me check if this slutty hole has sucked all my pee yet."
“Ah,..ah…, I’ve already sucked it all… don’t step on it anymore~…”
Rin used one leg to step on Sae’s face, forcing her to stop complaining, while the other leg played with Sae’s pussy until Sae’s waist twitched and arched up like a fish, squirting nonstop. As Rin expected, the water that squirted out was clear liquid, none of his urine was wasted. Sae was panting on the floor, only then was Rin picked her up and hugged her.
"I peed, now it's your turn, big sister."
Rin smiled and whispered into Sae's ear, it was true that having to hold Rin's urine for a while made Sae felt a little too full. But unlike her little brother, Sae could only pee once a day when her little brother allowed it. Her little brother carried Sae into the bathroom, stuffed his dick into Sae's overly sensitive pussy and pounded it, spread Sae's legs apart with both hands, and used the baby-holding position to pee Sae.
"Good girl, pee for me."
Sae's eyes rolled back as she was fucked, her urethra obeyed Rin's words as if he were its master's, and started to pee. Unlike Rin, who has a big dick and big balls, pees strongly, Sae can only weakly pee like a leaking faucet, causing a lot of urine to flow down her butt and spread to Rin's thighs. Rin doesn't mind it being dirty, but he uses this as an excuse to say that her older sister behave worse than a child, and really doesn't know how to be hygienic at all, so she can only pee once a day, and it must be under Rin’s allowing and supervision. If Sae can't hold it in anymore, she can kneel down and beg Rin to take her to the WC. Sae is used to this at home, but unfortunately, every time Sae has to pee at school, she can only go to class to find Rin. Her classmates praise the two sisters for being so close, thinking that although Sae is cold and arrogant, she really cares about her younger brother. Who would have thought that Sae would secretly pull Rin to a corner and kneel down and beg her younger brother to let her pee. Of course Rin can't go to the girls' restroom, this guy is almost sexist, he hates girls, he hate everyone, he only loves his older sister. So Sae can only follow Rin to the boys' restroom. Because she couldn't get her uniform wet, Rin allowed Sae to pee while sitting, but she also had to pee while sucking Rin's cock. Sae squatted on the sink, her mouth holding her little brother's cock and licking it vigorously, her pitiful eyes begging Rin. Sae's belly was already full of water, but without Rin's orders, she didn't dare to pee even when she was already sitting in the toilet, not daring to let a single drop fall out. She sucked Rin’s cock until he was satisfied, then he said the magic word "pee", this time the urine was like a broken faucet and spurted out strongly. Just being able to pee made Sae so happy that she had goosebumps, her eyes rolled back, and her mouth was still sucking on the cock. While she was happily peeing, Rin suddenly said "stop", and immediately her pussy tightened and she didn't dare to pee anymore. Sae was still holding half her belly full of urine, she was so desperate she actually considered kneeling down to Rin in the toilet and beg him. But Rin had made up his mind, Sae could only hold her pee.
"Neechan, you've peed enough. Now it's my turn."
"Can you not slap my face, if it's too swollen, it'll be awkward when I get back to class later." Sae begged
It was reasonable, so this time Rin let it slide.
“Alright. Then 6 slaps are enough, no need for 10. You can slap yourself.”
“… you are really…”
“Hurry up, neechan, I have to pee and we need to go back to our class. You know I don’t like to pee in a cold hole.”
“Okay, let me.”
Seeing her little brother looking at her with pitiful puppy eyes, Sae couldn’t bear to make her little brother uncomfortable, so she immediately slapped her own face 6 times. Her cheeks were also a little red and swollen, and she opened her mouth wide to put Rin’s glans on her tongue.
“Please pee in the urinal.”
Seeing that Sae’s mouth was already swollen and warm enough, Rin unceremoniously peed for her big sister to drink. The two heavy balls were filled with urine, and just like that, they were emptied into Sae’s throat. Poor Sae had only peed a little before she had to suck three times as much water into her stomach.
“Cover your pussy, don't let it leak any pee.”
Hearing her younger brother’s orders, Sae immediately covered her pussy with her hands while drinking Rin’s piss, her tears were welling up, and she had to pee terribly. Rin peed until the last drop and happily shook his dick against Sae’s tongue, letting Sae lick up all the remaining drops. Sae held a belly full of urine and thought to herself that she had to be really good when she got home tonight, seducing Rin so that Rin could fuck her until she lost control. Because only when Rin’s dick was pounding her pussy could she both climax and pee comfortably. Sae didn’t realize that this was just Rin’s way of manipulating Sae so that Sae would always look forward to being fucked by him.
So when they got home, Sae ignored her parents’ presence and tried her best to please Rin. She deliberately leaned close to her younger brother and rubbed her breasts against Rin like a horny bitch. Her parents scolded Sae for being too clingy and inappropriate. Sae blushed in humiliation, but the urge to pee won over her reason. If Rin didn’t fuck her tonight, Sae would go crazy. So Sae made up all sorts of reasons to get close to Rin. Rin was extremely enjoying Sae's initiative, he didn't deny any chance Sae bring her tits and pussy to him to play. The two sisters just stuck together and flirted, making their parents super annoyed, and they could only sigh and scold Sae. Rin defended his older sister, saying that their parents were overthinking things, that his older sister loved him too much, that's why they were so close, right older sister? Hearing that, Sae nodded repeatedly, apologizing to her parents that it was because she loved her younger brother that she wanted to stick with him. Mom scolded Sae again, didn't Sae herself asked to separate room with Rin in the past, but now it seemed like she couldn't live without Rin. Sae lowered her head, not knowing how to respond, and couldn't deny that it was true that Sae couldn't live without her younger brother. Sae pretended to ignore it and turned to Rin and said that it seemed like there was an extra thread in your pants, let me take a look. Then she used that as an excuse to kneel down and bury her face in her younger brother's crotch. The parents widened their eyes in shock and were about to grab Sae's hair when Rin stopped them, crossed his legs and clamped Sae's head between his crotch, pretending to ask innocently.
"Did you find it big sister?”
Sae was busy sniffing Rin's balls so she just nodded. So the family of four, her parents and Rin sat down to eat fruit, while Sae knelt face down in her little brother's crotch. Rin saw that their parents were feeling annoyed towards Sae and said,
"Just leave her alone. Since she was little, she's been crawling around my crotch all the time, it's okay, you guys are overthinking it."
Mr. and Mrs. Itoshi nodded when they heard that. It was true that since Sae was little, her parents had taught Sae to take care of her younger brother. Sometimes when Sae and Rin argued, Rin would refuse to eat, so her parents urged Sae to apologize to Rin. At that time, Sae also had to kneel down and apologize. The time when Sae asked to separate room was the most stressful time. In the end, Sae not only knelt but also had to kowtow to her little brother, and crawled like a little dog back and forth between her younger brother's crotch, begging for his forgiveness. As long as Rin was happy, her parents didn't care. Later, when they saw the two of them arguing, they urged Sae to quickly crawl over to her younger brother's crotch to apologize and make up. Because it was true that whenever Rin argued with Sae, his mood was very bad, which parent can stand their precious son being grumpy? They remembered there was one time Rin got angry and ignored Sae, then wherever Rin was standing, they saw Sae crawling over, her head buried in Rin's crotch, Rin looked down and saw his big sister's red head under her dick.
"Don't be angry. I'm sorry."
When Rin left, Sae silently crawled after and stuck her head in again. Her parents got used to it.
"Hmph, with Mom and Dad here, tell me, was it you or me who was wrong?"
"It's me who's wrong, I'm sorry Rin. Mom and Dad, it's my fault. I'm sorry for making the atmosphere in the house unhappy."
The parents scolded Sae and then told Rin that if he was still angry, he should take it out on Sae and not hold grudges in her heart. Fortunately for Sae, Rin was violent, but he loved his older sister too much to hurt her. Normally, he would just slap her in the face. Only once did Sae talk to another boy at school about the tests, Rin found out and got mad and beat Sae until she was bruised and purple. But it was also Sae's fault, so Sae didn't blame Rin. After that time, deep down, Sae was afraid of her younger brother. Sae realized how big the physical difference between the two was. Normally, Rin clung to Sae like a cat, but the truth was that if he wanted to, he could strangle Sae with one hand.
When the parents left, Sae was still burying her face in her younger brother's balls, then crawled after her brother to the room to fuck. Today, Sae was extremely obedient, actively shaking her tits and arching her pussy to do all kinds of humiliating things to seduce Rin. Rin sat on the bed, letting Sae sit on his lap, her soft breasts pressed against Rin's firm chest, her pussy lips clamping his cock while the two sisters kissed, their saliva soaking their chins. Rin caressed her big sister's sweet white skin, slim waist and big breasts, allowing Sae to ride his cock. Sae wriggled like a whore, letting her little brother's cock penetrate deep into her uterus, moaning and bouncing like she had lost her mind. Rin caressed Sae's round, protruding belly, laughing and saying.
"It looks like you’re pregnant with my child."
Sae blushed when she heard that, incest was already bad but if she really gets pregnant with Rin’s child, it would be truly hopeless. But Rin's cock was like a hot, fleshy iron rod piercing her uterus, it was so rough and big that it spread open her pussy lips, pressing on her bladder, fucking Sae until her internal organs were dislocated, making her so happy that she didn't know what to do anymore. Sae was used to being raped by her little brother, she couldn't reach orgasm on her own, she had to have Rin violently thrust his hips and pound her pussy. Sae collapsed on her younger brother, licking his chin and begging him with her mouth.
“Rin…Rin…help me….Fuck my pussy…”
“Neechan is so naughty, all day long you just wants me to fuck you.” Rin kissed Sae, his hand groping down to rub the pussy lips that were sucking his cock. “You want me to fuck you so you can piss, right?”
“Yes… I can only pee when Rin rapes me~ Rin, help me.”
“Neechan is so cute. You are my wife for the rest of my life.”
Rin hugged Sae tightly, making her unable to breathe, her pussy was limp, sucking his cock to the end, panting in response.
“I am Rin’s wife~ for the rest of my life~”
“So for the rest of your life you have to serve me, be a good cum and piss dumpster, give birth to my children, and never be away from me even one step.”
“Okay, I promise to be Rin’s sex slave for the rest of my life~~~ Rin can do whatever you wants to me.”
“Good girl.”
Satisfied, Rin flipped Sae over, let Sae lie on her back, and then almost bent Sae’s waist up, Sae’s pussy was only two hands’ spans away from her face. Her red pussy opened and closed, craving for Rin’s cock, Sae couldn’t help but feel humiliated looking at herself like that. Fucking in this position, Sae would squirt all her juices and pee all over her face later. Sae knew that but couldn’t do anything except for obediently hugging her legs and spreading her pussy open for her younger brother to rape. It was true that Rin’s strength was different, not just the cock poking the uterus but precisely pounding, pounding Sae until her pussy was so messed up that her eyes rolled back. The speed and strength were both so overwhelming that Sae couldn’t even make a sound, her tongue sticking out and drooling uncontrollably. Rin was as hard as a piston, fucking the soft, plump vagina repeatedly, Sae’s internal flesh was rubbed and squirted with juice, her uterus was whipped like a slave. Unlike Sae, whose brain was fucked out, Rin was still unfazed. Seeing that Sae was about to faint, Rin slapped her face and squeezed her cheeks to wake her up.
"Don't faint when I fuck you."
Sae's waist and inner thighs began to shake uncontrollably, the pleasure rushed like an earthquake, shaking all her senses. Her mind, like a 3-year-old child, completely obeyed Rin's command. Rin force Sae to throw away all morality and admit that she love her own blood brother, that she wants to be Rin's wife forever, Rin even controlled Sae's uterus, giving it orders to release water or contract, Sae's body would obey.
"Come on, open your mouth"
Rin saw Sae twitching and knew that her big sister was about to come, not missing the opportunity to make Sae open her mouth wide and stick out her tongue, telling Sae to look closely at her pussy that Rin was raping crazily.
"Good girl, I will let you climax and pee”
"AAAAAA thank you Rin....!!!!"
Sae screamed and then it was as if a switch had been turned on, her pussy juice and urine spurted out at the same time, shooting straight onto her face and mouth.
"I peed...on my face..."
Seeing his big sister being fucked by him to this extent also stimulated Rin extremely. His arrogant older sister was now no different from a sex toy, her whole body was kissed and sucked until it was red and blue, her pussy and uterus were fucked to a mess by his dick, and she was so happy that she peed on her own face. Suddenly, Rin pulled out his cock, holding the base and pointing it straight at Sae's face, and also started to piss.
Sae could clearly see the urine from Rin's glans shoot out like a water column, hitting her forehead and flowing all over her face. The smell of Rin's urine rushed into her nose, mixed with the sound of a man peeing, making Sae's eyes widen and her mouth open, her own urine mixed with Rin's urine continuously pouring into her mouth, forcing Sae to swallow it or else she would choke. Sae was so happy, both reaching orgasm and releasing her urge to pee made Sae more obedient than a dog, only her younger brother could make Sae feel this happy. She moaned while drinking Rin's urine sip by sip.
"Ah ah... Rin's urine... washing my face... uhm uhm... It tastes good... pussy … also wants Rin to use piss to wash~~~….”
Rin listened to his big sister’s lewd words and directed peeing cock onto Sae’s red, smeared pussy lips, the hot piss made her pussy lips swell up, Sae’s breasts also twitched.
“Is there any other place you want to drink my pee, my slutty neechan?”
“Ah ah…It's so hot… inside… the uterus… please Rin pee inside….”
Rin pressed the tip of his peeing cock back into Sae’s pussy, one thrust to the uterus, pouring all the remaining urine inside. Rin grabbed Sae’s hand to let her touch his big balls.
“Hurry up and massage my balls so I can pee easier.”
Sae listened to Rin’s words and massaged the balls, moaning and writhing.
“Mmmmm… Rin’s balls are so heavy… full of semen and urine inside… thank you, balls… for release in my pussy~”
“Not pussy, it’s a urinal.”
“Yesssss… Rin peed in the urinal~ I’m Rin’s urinal~~”
That night, Sae finally got her wish, being fucked by Rin until she peed. After that, he peed in her pussy and mouth, and even shot his cum all over her pussy. Sae was about to went unconscious when her sex monster younger brother spared her life. In the bathroom, Sae was so sleepy she just sat on the floor right at Rin’s feet. When she was hazing, a hot steamy water collumn poured down on her head. Rin was pissing on her again, but his piss was so warm she loved it a lot, so she just obediently took it. Finally, she held a full stomach full of semen and urine, got to bed and slipped Rin’s cock into her pussy and slept. In the middle of the night, Rin still had to pee, he pushed Sae head down and peed in her throat once more. As a result, the next morning, as soon as Sae opened her eyes, Sae felt the urge to pee again, but she could only pee once a day, and if she peed early in the morning, she would have to hold it in all day. Sae only had the choice of either holding back or begging Rin to fuck her so she could squirt and pee at the same time. Before Sae could decide, Rin woke up, he hugged and kissed his sister to his heart's content, then he took his cock to the toilet to relieve himself, letting Sae kneel on one side and watch him pee freely into the urinal while she herself had to hold her pee. Looking at the water jet made Sae even more horny. It was only morning and she already had to wiggle and clamp her pussy.
When we get to school, I'll probably have to go find Rin again... Sae thought to herself, not knowing that Rin was smiling at his sister. A loop had been set up~