Chapter 17: Bimbofication
Lisa Simpson was only an eight-year old elementary school girl, but she had always thought highly of her intelligence. And that self-confidence was well earned. She had always been recognized as the greatest academic achiever at Springfield Elementary. She had even once managed to convince a group of college students that she was one of them, all thanks to her incredible brain.
Despite her young age, Lisa had entertained the idea of becoming a president and leading the country. She certainly had the grades and work ethic to make it.
But recently all those aspirations had disappeared. Ever since she had accepted her role as her brother's submissive cumdumpster, her grades had started falling. How could she study when all she could think about was sucking Bart's cock? How could she listen to Ms. Hoover's lectures when she was busy rubbing her pussy under the desk and imagining all sorts of kinky sex acts?
Lisa had been transformed from a highly intellectual and hard-working girl into a sex-crazed underage nympho whose every waking thought was pre-occupied with riding and fellating her older brother's massive dick. In short, she was a total bimbo cumslut, no longer worthy of any respect. She had thrown away her future prospects in favor of becoming her brother's fucktoy.
Of course, Marge was not happy about the fact that Lisa's grades started dropping. As a punishment she prohibited her daughter from having sex with her or Bart until her grades got better.
Poor little Lisa had to sit alone in her room with her nose buried in a book while her darling Bart was fucking Marge's brains out in the other room. There was no way she could concentrate on studying while hearing the two going at it like rabbits in heat.
"Take it, you fatass whore!" she heard through the walls. Marge was moaning in ecstasy and the sharp sounds of Bart spanking her booty were echoing in the hallway.
"That lucky bitch," Lisa grumbled to herself. Bart never fucked her that hard. Maybe he was being considerate of her small frame and lack of sexual experience. She wanted him to stop treating her like a child. She wanted to be subjugated and treated as roughly as Bart treated their mother when they had sex. She wanted to be called filthy names while her holes were drilled mercilessly.
"When I grow up, I hope I'll have wide hips and a protruding MILF butt like mom. Maybe then Bart will fuck me harder."
Lisa hadn't made any progress on the book report. She simply continued playing with her pussy. But her fingers just weren't enough. She desperately needed the real thing. She could cum even if Bart only fucked her mouth. But on her own, she simply couldn't get a satisfying orgasm.
"Tell me what you are!" Bart yelled in the other room.
"I'm your buttslut mommy-whore!" Marge yelled.
"I'm almost there! Beg for my cum, bitch!"
"Cum inside me, baby! Fill mommy's asshole with your hot cum!"
"TAKE IT, MY ANAL QUEEN! AAAAAAAAHHH!"
"I'M CUMMING! MY TITTY-MILK IS SHOOTING OUT!"
Lisa could not take it anymore. She ran downstairs to look for puddles of cum. It was the weekend, so Marge and Bart had been fucking all day in nearly every room of the house. And they were too busy constantly banging to clean up after themselves. The strong smell of semen permeated the entire house. It didn't take long for Lisa to find a pile of love-juices on the kitchen floor.
The girl dropped on all fours and leaned forward to scoop up some of the cum with her tongue. She shifted the sticky liquid in her mouth, enjoying its many flavors. The taste of Marge's salty pussy juices and the distinct flavor of her butthole were mixed in Bart's semen. She enjoyed those additional subtleties, but the taste of her brother's semen was the delicious main course. That was the unmistakable nectar that only her stud of a brother could produce. Rich in consistency and with a sweetness that could not be replicated.
As Lisa was bent over licking the puddle of jizz, she heard footsteps behind her. She quickly turned her head, worrying that she might get in trouble. After all, she was supposed to refrain from all sex acts, and drinking semen probably counted as one.
But it was just Santa's Little Helper. A loud thumping noise came from upstairs. It sounded like Bart was done taking a break and was back to his Oedipal conquest. His thirst for Marge's big yellow ass was seemingly unquenchable. The housewife's voice was even more hoarse than normally from moaning at the top of her lungs all day.
The neighbors had called the cops twice that day because of the amount of noise coming from The Simpsons household, but both times Bart and Marge were able to convince them that nothing was wrong.
Lisa looked at the family dog, deliberating. Touching herself didn't bring the kind of pleasure she was looking for, but maybe a horny mutt might do the trick.
The little girl pulled up the hem of her dress and wiggled her tight butt seductively.
"Here, boy," she whispered. This got the dog's attention. It approached her and she pulled down her panties.
"This pose is called downward dog. I trust your biological instincts will tell you what to do next."
Santa's Little Helper started curiously licking Lisa's hindquarters.
"Ahh! That's a good boy. But I'm already wet enough for you. Just mount me already, please."
The dog continued licking with a clueless look in its eyes. Lisa was beginning to worry that things would not escalate farther. Just then, the dog put its front paws on the girl's back to lift itself up and line its crotch up with her quivering pussy.
The insertion was quick and painless. Heavy natural lubrication aside, the dog's penis was nowhere near the same size as Bart's. But what Santa's Little Helper lacked in size it made up for with aggressive thrusting. The dumb animal followed its basic instincts, humping its owner without any reservation. Its paws were pushing the girl's face against the floor while its lower body was energetically plowing her tight pussy.
"Yes, good boy. Good boy," Lisa repeated mindlessly. "Harder! Go balls deep. Make me your bitch."
But the fun was over nearly as soon as it had started. After only twenty seconds of hardcore fucking, the useless mutt blew its load. Its dick went limp instantly and it clumsily climbed off Lisa's back.
"Wait, we can't be done yet. I didn't cum," Lisa complained. She wiggled her creampied pussy for the satisfied animal, trying to encourage it to go for a round two. But Santa's Little Helper just looked at her blankly and walked out of the kitchen.
The next day at school Lisa had dark circles around her eyes. She had gone the whole previous day without getting an orgasm. She was hornier than ever in her life, but without any outlet. Marge's punishment was way too cruel. The greedy bitch just wanted Bart all to herself. What a bad mother she was.
Lisa's sexual frustration made it impossible to pay attention in class. She just absent-mindedly rubbed her clit under the desk while fantasizing about her brother. She didn't know how she could go another day without being railed by him.
"Ahh, Bart," the girl tried to moan quietly as she closed her eyes. She sucked on her pencil, imagining it was the spiky-haired boy's veiny rod. Her shlicking got more intense.
"Eww!" yelled the girl sitting behind Lisa. "Lisa wet herself."
Lisa snapped out of her fantasies and looked around. There indeed was a puddle on the floor at her feet. All of her classmates laughed.
Ms. Hoover tried to resolve the situation.
"Lisa, next time raise your hand if you need to use the bathroom. Please go get changed in the locker room. You may wear your PE uniform for the rest of the school day."
Lisa nodded and got up from her seat. That situation might have been humiliating for her past self, but her current self simply did not care. Everything about school and her reputation was meaningless. She just wanted to get off.
Lisa made her way to the girls' bathroom. She entered one of the stalls and pulled out her phone. She dialed Bart.
"What's up, sis?" Bart answered.
"Come to the girls' bathroom on the first floor. It's an emergency."
"Emergency? What happened?"
"I'm just so horny. I know mom told us that we can't have sex until I bring my grades back up, but this is torture. Please come here quickly and fuck me until I pass out."
"No can do, Lisa," Bart said apologetically. "I'm not at school right now. I'm at Professor Frink's lab. We're working on some cool new drugs that should make our sex lives even more spicy."
"But I need to gargle on your cum," Lisa whined with tears in her eyes.
"Well, you'll just have to wait until after school. Trust me, it'll be worth it."
"Please, Bart. Don't leave me hanging. My pussy is so wet, but I need your help to be able to cum."
"I see. I'm kind of happy to hear that. How about phone sex then?"
"Yes! Let's do it. Talk dirty to me, big bro!"
"Okay then. Lis, I really like it when you suck me off and look at me in the eyes…"
"Don't be so romantic," Lisa interrupted. "I want you to be more kinky. Degrade me. Objectify me. Call me filthy names. Like you do with mom."
"Oh, so that's what you're into," Bart chuckled. "Okay then. You're a cum-gargling gutter-whore. The only good things about you are your tight undeveloped fuckholes."
"Yes, more!" Lisa moaned, fingering her pussy intensely. "Tell me more what a worthless whore I am!"
"The only reason you were put on the planet was to become my incest-loving cocksleeve. Your existence is on the same level as a cumrag. You're nothing but a fuckable pile of meat."
"Tell me I'm a dumb bitch!" Lisa requested.
"Geez, Lisa. You sure about this? Even if it's just dirty talk, I don't want to hurt your self-esteem…"
"Just say it!"
"You're a dumb fucking whore who only thinks about serving my cock. You're nothing but a brainless fleshlight that is shaped like a grade schooler."
"Oooh! I love it, Bart! Be more mean to me! It makes me tingle all over!"
"Shut up, you stupid loli bitch! Your cocksucking lips aren't meant for words. Your mouth is only to be used for deepthroating. You can forget about ever amounting to anything, because the only thing you're good for is being my obedient sex slave. I only keep you around so I can use your cunny and mouthpussy when I please."
"More! More!"
"You're nothing but a well-trained cumdumpster groomed for hardcore fucking. I don't even view you as my sister. You're just a handy slam-pig I can use to drain my balls. You're masturbatory tool that I can discard as soon as I bust a nut and then use again when I'm horny. No other personality is expected of you. You might as well turn off your brain and enjoy being my mindless sex-bot."
"Oh, Bart. I'm gonna squirt."
"Who gave you permission to cum, whore? As my personal cumdumpster slave you need my permission to do anything."
Please, master," Lisa whimpered, trying her best to hold in her orgasm. "Let your stupid bitch sister cum. I beg you!"
"Fine. You seem to know your place, so I'll be lenient. Turn on video call and show me your O-face. Cum for me, you dumb cunt. You filthy fucking second-grader cumslut. Cum and make the most retarded face you can pull off."
"OH YES!" Lisa screamed and arched backwards on the toilet seat while doing the victory sign with her hands. Her pent-up orgasm shot out continuously like a fountain and lasted for over ten seconds. Her sensitive pussy was spasming out of control and she rolled her eyes to the back of her head. She stuck her tongue out and let the drool drip on her flat chest.
"Yes, that's a nice face fitting for the dumbest slut on the planet," Bart said on the video call.
Lisa crossed her eyes and used her fingers to spread the corners of her mouth to a wide grin.
"Blehh!" she said. It was a look of mindless submission to carnal pleasures. "Dumb slut at your service."
"Oh, Lisa, I want to cum on your face so bad. You better make that silly face the next time we meet."
"Anything for you, master."
"Okay, I've got to run now. There are a few more experiments to run. I'll see you later tonight. Get ready for it."