Annie

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Annie woke up with a smile. She loved her new life - she knew that at least part of that love was artificial, but no part of her cared. Before her brother's meddling, she'd only ever cum a few times a week, and even then only by her own hand. Now, it was rare for her to go more than an hour without an orgasm or five - and most of them were accompanied by the delicious feeling of being stretched out by her brother. Her life had turned into a constant sexual haze, constantly pleasuring men and being pleasured...

She'd never been so happy.

Slipping out of bed, careful not to wake her mother, father or brother, Annie looked at her naked body in the mirror.

Her tits were plump and obviously fake - she'd begged to get implants for her birthday, just like her sister. Finally, after his fifth orgasm of the night, her father had agreed. She'd grinned up at him, his cum spilling out of her mouth and landing on the floor.

"See, Daddy," she'd said seductively, "once I have the operation, I won't make such a mess on the carpet..."

The mental image of his youngest daughter dribbling cum onto large implants was enough to get her father hard again, and Annie's eyes had lit up at the sight of her father's huge cock thickening once more...

Turning around in front of the mirror, Annie couldn't help but be proud of her progress. Her asshole gaped invitingly, and she reached around, just to watch her entire hand fit into her rear cavity.

When she withdrew her hand, it was slimy, and Annie smiled. She was so frequently pumped full of cum that she was constantly lubricated, ready for whatever cock wanted to take her next.

Her tattoos had been slowly growing in number - she was up to number eight now, which meant that next time she got inked, she'd have to find nine men that she could service. Her eighth tattoo was a fierce dragon, with a ferocious look on its face, and a huge, fiery, threatening cock. It was aiming it toward a young fairy that looked like a combination of Annie and her equally-slutter older sister, dressed like Tinkerbell, bent over to expose a huge, red, ass. The fairy was reaching behind herself, opening her hole up for the dragon's huge member, a look of fear and lust on her face...

It had been expensive, but Annie and her sister had received a half-price deal in exchange for going around to the tattoo artist's house for the weekend and sericing his every need...

A noise behind her made her start, but it was just her brother, slowly sliding into their mother's sleeping form.

Annie would never forget the day that Rob had first taken his mother - it had been a huge occasion, and when Annie had seen Rob typing at his computer directly beforehand, she'd known that he had something up his sleeve...

September 20th: gawd my mother can squirt

September 20th whenever she cums its like a flood. delicious tho! ;) my sis and I can never resist it...

When Rob's cock had come out, his mother had stared at it, entranced, practically drooling. She'd tasted it before, but she'd yet to be fucked by his beautifully huge member...and it was becoming rare to enter any room of the house without seeing Rob screwing someone, whether it was one of his sisters, the neighbour, or even a random woman he'd picked up on the street. Ever since Annie had made him irresistible to women, he'd been taking full advantage of it...and them.

But knowing that at last she'd be fucked by her own son, the boy that she'd given birth to...Rob's mother had seen how much pleasure he brought other women, and she was practically trembling with anticipation.

Annie and Amber had sat to the side as Rob's father had directed the scene, running the crew approximately through what was going to happen, where to focus the cameras when, and making sure that Rob and his mother knew their roles.

They'd nodded along, but Rob had glanced at Annie, and she suspected that they'd both known that nothing was going to go as planned...

As soon as Rob had slid inside his mother's mouth, her orgasms had started, and - just as Rob's tweets had instructed - juices gushed out of her so quickly that Annie's last rational thought was that her mother ran a serious risk of being dehydrated.

The fluids started flying, however, and Annie and Amber ran forward in delight, desperately keen to taste the delicious liquid, touch it, bathe in it...

Rob's father had improvised, as necessary, and the home video of Rob taking his mother for the first time had earned a subtitle - "Sister Sluts Love Mother's Squirts".

Watching her mother and Rob now, Annie took the opportunity to play with herself. She knew that she didn't have long to make herself cum - as soon as her mother did, her mind would go blank, and all she'd be able to think about would be getting her mother's sweet pussy juice in her mouth, gulping it down as fast as it could be produced.

With a grin, her brother watched her desperately play with herself. He had complete control, she knew - with a thought, she could make their mother cum, and Annie getting her orgasm before then relied entirely on Rob's goodwill.

As Annie forced an entire fist into her own cunt, her eyes widened. She watched Rob pull out his cell-phone, where she knew he'd recently installed the portable version of Master Hacker. She wanted to cum, but more urgently than that...she had to know what he was writing.

February 3rd: Luv my sis' pussy. As much as she stretches it, its tight again the next day. Wassup wit dat??

February 3rd: Unlike my cunt wich gapes more every day - LOL

Rob watched as his sister glared, while her pussy lips began to tighten. She'd spent so long, used so many large toys...and he'd undone all of her hard work in less than a minute. He smiled, knowing that his latest updates would drive Annie crazy - Annie had become obsessed with being stretched out, and his wording had ensured that no matter how hard she tried, she wouldn't be able to loosen herself as much as Amber.

Before she could say anything, he mentally willed his mother to cum, and watched as Annie's eyes glazed over and she ran forward, desperate to taste the liquid gushing from his mother's cunt.

The abrupt arrival of another body on the bed woke their father up, and he scowled at the sight.

"Why didn't anyone tell me you were starting already? I would have turned the camera on..."

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Meanwhile, in the room next door, Amber was awake. She'd been awake for almost 36 hours straight now - her brother had set her a challenge. She was to watch every one of the family's DVD releases in a row, and come up with some ideas for more. Beside her was a notepad with dozens of ideas scrawled upon it, and on the other side was an industrial-sized tin of lube, the largest sex toys that the family could find, and a pile of bottled water, to prevent dehydration.

There had been more to Rob's challenge than had met the eye.

January 29th: god i luv my fam's porn. i can never get through a whole one without having to get myself off...

As the sixtieth consecutive porno started ("Fucked and Fisted by Father"), Amber's glassy eyes stared at the screen, and her hands automatically reached for two of the largest sex-toys: a large black dildo, and a toy that looked like a man's fist. Since the twenty-four hour mark, she'd been exactly duplicating the action on-screen, and cumming at the same time as the women in the film (often herself) did. It saved her brain from having to think.

The large pile of watched DVDs included "DP My Mom and Me", in which Annie and her mother had simultaneously been double penetrated (Amber had used two thick vibrating dildos for that one), "Size-queen Sis" (a video of Amber taking the "American Challenge", a feat that she'd replicated while watching the video) and "Sis' Gangbang Birthday" - it had only been Annie's birthday, but for the sake of the film, Amber had joined in, and managed to take two cocks in her ass at once for the first time.

There were only a handful to go, unless her father had managed to release some more while she'd been watching. Through the entire twenty-four hours, a webcam in the corner had been live-streaming Amber's efforts, and every now and again a family member had wandered in with suggestions from the chat.

"Mike from Michigan wants you to use a ballgag for the next few," her father had suggested, tying it on before she'd had a chance to object.

"Some guy named Harold wants to see you do that thing with your feet behind your back," Annie had piped in at one point.

"A chick called Geraldine thinks you should wear nipple clamps while you watch Daddy Gapes Me Best, because you were in the video," her mother had added, a few videos later.

When Rob had come in, he hadn't made any suggestions, just slowly fucked her ass while "Tattooed Anal Sister Slut" played in the background. When he'd cum, he'd pulled out without a word, and left to see what his other sister was up to.

Amber looked at the small pile of DVDs left to go. Every part of her ached with exhaustion, her mind was fried, and she knew that cumming through the last few DVDs would be a struggle...but she felt a strange feeling of pride.

She turned and winked at the webcam, before turning back to the screen, and slowly sliding the fist into her loose ass. She shuddered with pleasure at the feelings coursing through her body...she loved being stretched, it gave her more pleasure than anything she'd ever imagined. And with her well-hung brother and father regularly taking her, not to mention her sister's penchant for huge toys...well, she was constantly presented with opportunities to feel her gaping pussy expand, and hang loosely.

Amber loved her new life.