This story is fucking silly, but I guess it's inspired by Susan, as far as light-hearted gore goes. Anyway, first time writer, and all that. Here you go.

Car Fight

(m/f, loli, vivisection)

The two siblings had spent hours in the backseat by this time, and as anyone with experience would expect, they both grew fidgety as their boredom skyrocketed. Alyssa had resolved to behave this time, sitting quietly in her seat for the first several hours of the trip, confident that if - or realistically, when - a fight broke out, she would be free of blame. By the time the first blows were struck, however, she was leaning to her side in what could be interpreted as an encroachment of territory, which was exactly the justification given for the light kicks she was now receiving from her left.

"I'm just resting, geez!" she said, righting herself. The difficulty of maintaining vertical posture was nevertheless taking its toll, and in her annoyance, she reciprocated a few playful kicks.

"Hey!" shouted Alex. Their parents winced, recognizing that the tension had reached its breaking point, meaning the end of peace and quiet, probably for good. Soon enough, the children were pressed against their respective doors, kicking each other relentlessly until everything below their shorts was bruised and scratched.

Alex, having had enough, grabbed his sister's leg in mid-kick and twisted it hard. Alyssa cried out in pain as she felt something tear. The smirk on her brother's face left her more furious than ever. The violence was clearly escalating - why not take it a step further?

Alyssa took a hold of her brother's arm and bit down blindly and with intense force. Their parents rolled their eyes as Alex screamed, until her teeth met, with his little and ring fingers still in her mouth. She spat them all out at him, then stuck out her tongue.

Enraged, Alex grabbed her hair with his left hand and hooked her collar with his remaining fingers, tearing the shirt open and exposing her bare torso. Having just hit puberty, breasts were only hinted at; she had never needed a bra, but now she wished she was wearing one. In the meantime, her chest was prominent enough that Alex, having obtained some scissors from his box of school supplies, managed to skewer the nearest breast with the scissorhead, eliciting quite a scream from its owner.

As he proceeded to punch her exposed stomach, she yanked out the unguarded scissors - another blow, derailing her grip - and a severed nipple fell onto her lap. Tears streaming down her face, she stabbed downwards with the scissors, landing directly between her brother's legs. Jerking the scissors away, she held up her brother's erect penis, severed at the base of the scrotum.

A kick to her stomach caused her to drop the scissors, along with the genitalia, which Alex extracted and tucked firmly back between his legs.

Meanwhile, the raucous was taking its toll on the adult passengers. When it appeared that the two were scrambling over their seats to get at each other, their father shouted, "Kids, sit straight! What if there's an accident while you're monkeying around? And keep your seatbelts on!"

"We are!" Alyssa shouted back, though her body had recently been carved in half at the waist (just below her navel), making the strap rather useless in the event of an emergency. As her top half clambored over her brother's shoulder, biting into the muscle, Alex took advantage Alyssa's loss of feeling to strip her lower half and jam his fist into her cunt repeatedly, widening the hole with each blow. Just as his right arm fell off under his sister's incessant gnawing, his left went all the way through, penetrating the cervix and puncturing the top of the uterus!

He reached forward with his hand until he found the organ he was looking for, and gripped it. Then he pointed the severed abdomen at Alyssa, who was swinging his severed arm at him, and squeezed. "GROSS!" she screamed as her face became soaked with her own urine. "Moooom, Alex made me pee on myself!"

As usual, the specifics of the accusation were lost on her mother, who could only sigh and shake her head. Without taking her eyes off the road, she chided, "it doesn't matter who started it. If you were really that much better, you wouldn't still be fighting!" Their father chimed in, hoping to lighten the mood: "It's only an hour more, kids. Tell you what, if you prove that you can behave for the rest of the trip, I'll buy you ice cream as soon as we get there. How about it?"

The offer was dulled somewhat by the looming boredom of staying in a motel for the duration of their father's dumb colloquium, but if it was the only pleasant thing they would experience on this trip, they sure as heck weren't giving it up.

Alex withdrew his arm from his sister's vagina, sat her bottom half in her upper half's waiting arms with a grunt, then folded his arms and pretended to look out of the window. She set it down and tried to scoop up stray intestines, which she stuffed into her abdominal cavity haphazardly before handwalking over her severed lower half, dropping down with a sigh, and getting comfortable until she could move her legs again. Suddenly, her pussy felt sore and raw; she clasped her crotch and rocked for a few seconds, shooting a glare at her brother. He didn't seem to notice.

Scooting back, she felt something under her butt. "Aw maaan," she moaned, realizing that she had put herself back together with the lower strap of her seatbelt still behind her. With little hope, she implored, "can I just quickly just unbuckle--"

"No!" answered her father, firmly.

Alyssa sighed and brought the strap to the small of her back, inching it back and forth until she felt it slide into her spine, severing feeling in her legs again. Suddenly, she felt a snag. Looking down, she saw more urine trickle onto the seat. For some reason, the sight was all the more fascinating in the absence of any and all feeling in her nether regions. She reached down tentatively and prodded her clit with her index finger. Nothing. The sensation of having no sensation was... well, sensational, if she had to describe it. Trying to remain discreet, she yanked sharply on the elastic belt, inching it past her spine and into her belly, displacing some of her entrails.

She could feel the friction of her intestines against her upper half, as well as the sliding of her two halves against each other. The feeling in her gut was similar to what she experienced during free fall, or on a roller coaster. She slid a hand over her belly button and fingered the divide before slipping them inside. She let her fingers run downwards across the inside of her abdominal cavity, her other hand following on the outside. Soon, she was pressing her pussy from both inside and out, and it was to this exhilarating sensation that her legs - and twitching pussy - awoke, causing her legs to shoot out in an electrifying (but still quiet) orgasm.

"Please don't kick the seat, dear."

***

"Holy moly, you guys really made a mess back there," chuckled their father. His wife eyed him with a stern expression. "Those stains could be very difficult to clean. I thought that you would have matured since last time, but it's like you just never learn," she said, looking to the sky in exasperation. Alyssa recalled their previous kerfuffle. If she recalled correctly, she had emerged the victor with one remaining limb.

The siblings were wearing towels now, standing next to their car in the motel parking lot. "Sorry," they mumbled together, looking at their feet. "I won't do it again," they mumbled separately.

"Because of your nonsense back there, you'll have to walk through the hotel lobby in towels. I sincerely hope you've learned your lesson this time," continued their mother. Indeed, the towels were embarrassingly small, and no matter how she held it, Alyssa felt that she was leaving something exposed. She eventually settled on her butt, which was her least mutilated private part for the time being.

"Yes, ma'am," responded Alex half-mockingly. After a few steps, he paused, darted back to the car, appearing to search for something in the back seat. Lifting up the seat cushions, he produced his somewhat deflated dick, which he held by the tip, letting it dangle comically for a few moments before tucking it discretely under his arm.

***

Her nipple held on by a band-aid, and her waist held together by sheer balance, and remnants of the ice cream she had just eaten trickling out of her belly, Alyssa threw herself onto the bed in exhaustion. The little twirl she always did to land face down on the mattress succeeded in planting her face in her own crotch. Opening one eye, she turned her ass on its front, fluffed up her buttocks like pillows, and finally went to sleep.