Previous chapters:
One | Two | Three | Four | Five | Six | Seven | Eight | Nine | Ten | Eleven | Twelve
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Uncle Sean had one further nasty surprise for the girls at bedtime.
He ushered them straight to their bedroom after they had given their kisses to their uncle and cousin, not even allowing them to use the bathroom or toilet.
At the door of their bedroom, he passed Avery a small handful of items. Madelyn looked, and saw that it appeared to be two metal collars, and two lengths of chain.
“You’re to sleep naked tonight,” he said. “That lingerie is not designed for sleeping in. And I’m going to need you chained to your beds. It’s just for tonight – I’m just a little worried that your first night in a new house may give you bratty ideas. Avery, can you supervise?”
“Yes, daddy,” said Avery enthusiastically.
“Good girl,” said Sean. “If you can be trusted to chain yourselves, I can leave you to undress in private. But otherwise I’ll need to chain you up myself. The collars are time-locking – they’ll unlock automatically in the morning.”
Avery promised that she would, indeed, chain herself and her sister to the bed, and Uncle Sean left them alone.
Avery promptly stripped out of her lingerie.
Madelyn was more hesistant.
“Maddy, you have to undress,” said Avery. “Daddy said so.”
“He said the lingerie wasn’t for sleeping in,” said Madelyn, “but this shirt would be really comfy to sleep in.”
Avery bit her lip – and then she approached her sister, and slapped her across the face.
“We have to do what daddy says, Madelyn,” she said. “If we’re good girls then he’ll treat us nice. But if you’re bad we might both get in trouble. You need to undress.”
Madelyn didn’t think she’d ever get used to being slapped across the face – and still less by her cute younger sister. But Avery was right that continued resistance over something relatively trivial would only lead to further humiliation. She took off the shirt and stood naked in front of her sister.
“Now, the collars,” said Avery. She fitted a collar to Madelyn’s neck, and Madelyn felt it click into place, locking shut on her neck.
Avery did the same to herself, and then looked at the bed.
“Should we both be chained to the same end?” she said. “I guess that way we can kiss if you feel sad again.”
Madelyn shuddered with shame at the memory of kissing her sister – and how it had made her aroused. The truth was that she did want to kiss Avery again, and feel that same warmth in her pussy, and let it distract her from her shame and humiliation. But she knew that impulse was slutty and perverted, and she needed to do her best to deny it.
“No,” she said. “We should do top and tails. You chain me to the head of the bed, and you to the foot.”
The bed was quite large, enough for a single girl to get lost in. Avery chained Madelyn to the head of the bed, with about three foot of chain between her collar and the bedhead. Then she turned out the bedroom lights, and crawled into bed, chaining herself to the foot of the bed.
Madelyn immediately realised her mistake. Avery had given herself a bit more loose chain than Madelyn had, and she had wiggled down the bed until her feet were touching the bedhead. This left her cunt more or less level with Madelyn’s face, and Madelyn could smell the wetness of her sister’s arousal.
Avery’s face, in turn was level with Madelyn’s pussy, and Madelyn could feel Avery’s breath on her pussy lips. Her cunt tingled, and she felt her nipples harden.
She tried to wiggle away from Avery a bit. It meant lying on the very edge of the bed, but Avery didn’t pursue her.
Then Madelyn tried to sleep.
After all the humiliations, it was surprisingly easy to doze off – but she woke up in the middle of the night with a very particular dilemma.
“Avery,” she hissed. And then, when there was no response, “Avery!”
Avery stirred, and spoke in a half-asleep voice. “What’s the matter?”
“You have to let me out, Avery,” said Madelyn. “I need to go to the toilet.”
“I can’t,” said Avery. “The collars don’t even have a keyhole. They’re time-locked, remember? And the catch on the chain that secures it to the bed is the same.”
“Avery,” whispered Madelyn. “I can’t hold it in. My bladder’s bursting. And it’s still hours till dawn.”
“Oh, gross,” said Avery. “What are you going to do?”
Madelyn whimpered. There was very little she could do. She couldn’t leave the bed. She wasn’t sure there were any containers that she could piss into in the bedroom, let alone in reach of her chain.
“Please, Avery,” she said. “If I wet the bed it will be so gross, and I know Uncle Sean will use it to justify doing something weird to us.”
“There’s nothing I can do,” said Avery. “Can’t you hold it in?”
“No!” whined Madelyn. She felt like she might cry. She was about to wet the bed, like a baby, and soak herself and her sister in piss, and they would both have to lie in it until morning, when Uncle Sean would discover it – or, worse, Logan – and then…
“Madelyn,” said Avery, “you know I love you, right?”
“Yes,” said Madelyn.
“I’m not allowed to say sorry for slapping you,” said Avery, “I’m supposed to say you deserve it. But you know I don’t like having to slap you, right?”
“I know,” said Madelyn.
“There’s something I can do for you,” said Avery. “It’s weird, but… I don’t mind. And… it’s better than wetting the bed.”
Madelyn felt overwhelmed with gratitude. “What is it?”
Avery shifted in the bed, coming closer to Madelyn. Then she used her hands to spread Madelyn’s legs, and then…
“No!” squeaked Madelyn, bucking her hips, trying to get away from Avery.
Avery had just pressed her lips against Madelyn’s pussy! She had felt her own sister’s lips on her cunt!
“I know it’s weird,” Avery was saying. “But really, it’s okay. I can swallow it, and then you won’t make a mess. I don’t mind – I’ve tasted my own before, it’s not so bad. Please, Maddy, let me.”
Madelyn squeezed her thighs together, and put her hands on her sister’s thighs, intending to push her away.
Except… what choice did she have? She could wet the bed, or she could do what her sister was suggesting. Piss in Avery’s mouth.
They were both gross. But one was… tidier. And wouldn’t get her in trouble with Uncle Sean. And Avery said she didn’t mind.
“Okay,” she said in a small voice, and, hesitantly, she spread her legs.
She felt Avery come near again, moving her whole body until her tits were pressing against Madelyn’s belly, and her cunt was very near Madelyn’s face. And then Madelyn felt her sister’s fingers parting her pussy lips, and then Madelyn’s warm breath on her fuckhole, and then Madelyn’s lips were there, kissing her cunt.
Her sister’s tongue flicked out, running up and down the length of Madelyn’s slit, teasing her clitoris, pushing slightly into her fucktunnel.
“Do it,” Avery whispered. “Let go.”
Madelyn found it was very hard to tell her bladder to relax. It knew that Avery was there. It knew it would be pissing into Avery’s mouth. And on top of that, she was aroused – the flick of Avery’s tongue on her clitoris had made her whole pussy throb.
But slowly, she managed it, and suddenly the urine was flowing, and she was pissing into her sister’s mouth.
True to her word, Avery swallowed, and swallowed again, and again, taking in all of Madelyn’s piss. And when Madelyn’s bladder was empty, Avery didn’t move away. Instead, her tongue began licking Madelyn clean, in slow, high-pressure licks that pushed hard on Madelyn’s clitoris. Avery pushed her tongue as far up Madelyn’s fuckhole as it would go, and then pulled it out, and then licked again.
Madelyn knew she should stop Avery now. Avery had done what she offered. But her tongue felt so good. And Avery was doing it in such a loving, intimate way. It was clear she wanted to do this for Avery. So Madelyn let it happen.
She felt a little guilty. Avery’s cunt was right there, in front of her face. Madelyn could return the favour. But while she could permit herself to simply not resist, and have her cunt licked, actively choosing to tongue her sister’s pussy was a bridge too far.
So she lay there, and stared at her sister’s cunt, as her pussy got wetter and wetter, and Avery licked and licked.
And before long she felt herself orgasming against her sister’s face, her body shaking, her cunt muscles spasming. She leaned forward and pressed her cheek against her sister’s inner thigh, gripping her leg, just to have something to hold, as her body trembled with pleasure.
When it was over, Avery finally withdrew her tongue.
“Thank you, Avery,” whispered Madelyn.
“It’s okay,” said Avery. “I love you, Maddy. I just want to make you happy.”
And shortly thereafter, both sisters fell asleep.
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In the morning, the time-locks on their collars and chains disengaged, as predicted. Avery immediately jumped up and ran out of the bedroom, eager to use the toilet, and she was gone before Madelyn could remind her that she was nude, and that running around naked was slutty.
She returned soon enough, though, her bladder relieved, and apparently no one had seen her.
“We need to do our photographs now, for our diaries,” said Avery.
Madelyn had wanted to forget about this demeaning task, but Avery was right. She took up the Polaroid, and when Avery spread her legs she took a photograph of Avery’s naked cunt. Then Avery took the camera and photographed Maddy’s pussy.
Their photographs were pasted onto the next page of their diaries, and then they sat down to journal their sexual thoughts and activity.
Madelyn wasn’t far into hers – she was describing how she had danced for Uncle Sean and Logan, showing them her tits and cunt and bouncing lewdly – when suddenly an alarming thought came to her.
“Avery,” she said, “What are you writing in your diary?”
Avery clutched it to her chest. “I’m not supposed to show you mine,” she said.
“You’re…not writing about last night, are you?” asked Madelyn. “About… what you did when I needed to pee?”
“We have to, Maddy,” said Avery. “It’s the rules.”
Madelyn went white. Avery was writing about it. She was writing that Madelyn had pissed in her own sister’s mouth, and then allowed Avery to lick her cunt to orgasm.
“You can’t!” Madelyn gasped. “Please, Avery – you can’t tell that to Uncle Sean or Logan.”
“You’re supposed to call him daddy,” said Avery. “And I’m supposed to slap you if you don’t. And if we don’t write about it and daddy finds out we’ll get into so much trouble. You have to write about it too!”
“Please, Avery,” begged Madelyn again. “If… if daddy finds out we did that, he might do anything to us. He’ll call us sluts and… I don’t know, punish us. Or worse. Please. If you love me, you can’t write that down.”
Avery looked torn. She wanted to be a good girl and follow the rules. She wanted to please her new daddy. But she also loved her sister.
“I’ll do anything,” said Maddy. “Anything you want.”
Avery bit her fingernail cutely, and then said, “Can we do it again?”
“Do what?” asked Madelyn.
“What we did last night,” said Avery. “It was kind of hot, to drink your pee that way. And it didn’t taste bad. I didn’t mind. And then I really liked licking you, because it made you so happy. If we can do it again, I promise not to write it in the diary.”
“It’s wrong, Avery,” she said. “Sisters… shouldn’t do those things.”
“Why?” said Avery. “It doesn’t hurt anyone. And it’s fun.” She made her cutest eyes. “Please? Let’s do it again, every night, and in return I promise I won’t tell.”
Madelyn knew that what Avery was proposing was disgusting, and slutty, and incestuous, and perverted. She knew that no nice girl would agree to piss into her sister’s mouth, and let her sister lick her cunt.
But if she didn’t, Avery would tell Uncle Sean she had done those things. And then Uncle Sean would know she was a perverted slut. And besides, it had felt good. And Avery was right – it didn’t hurt anyone.
“Okay,” said Madelyn in a quiet voice.
“Really?” said Avery. “Really truly?”
“Yes,” said Madelyn.
“Show me,” said Avery, bouncing up from her seat. “We’ve got time before breakfast. Let’s get back into bed and we can do it.”
“Right now?” protested Madelyn. “Avery, we should…”
But Avery was grabbing her hand and dragging her back to bed, and soon Madelyn found herself in a nude 69 with her cute younger sister. Already Avery was spreading Madelyn’s legs with her hands, and bringing her face to Madelyn’s cunt.
“Oh, but this time, you have to lick me too, okay?” said Avery. “Fair’s fair.”
Then she snugged her face against Madelyn’s twat, pulling back only briefly to say, “Wow, Madelyn, you’re so wet” – and then, a moment later, “Okay, you can piss now.”
Madelyn was wet. She was ashamed of it. She was ashamed that she was aroused by the idea of pissing into her sister’s mouth. All she could do was ignore it, and pretend it wasn’t happening, and enjoy the feeling of her sister’s lips against her wet cunt as she slowly relaxed her bladder.
She didn’t have much to piss, after last night, but it was enough that Avery had to swallow twice. And as she did, Madelyn leaned forward, and used her fingers to part Avery’s pussy lips.
Her clitoris looked so cute and pink. And her fuckhole was clean, and eager. And the entire of Avery’s pussy was already sopping wet, such that her fingers came away trailing sticky ropes of girl-juices.
As Madelyn finished pissing, Avery started to lick her clit, and in response, Madelyn leaned in and began to suck on Avery’s clitoris.
Avery instantly wiggled with pleasure, and began to lick her sister’s cunt even more enthusiastically.
Soon both girls were passionately sucking each other’s twats, their bodies pressed together, tits flattened against each other’s bellies.
Madelyn realised that, under the agreement she had made, she would be doing this on a regular basis now. Every night, she would piss in her sister’s mouth, and then they would lick each other’s cunts to orgasm. This was part of who she was now.
And with that thought, she felt herself cumming.
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