Twilight's Science Class

Limestone whimpered, trying to shuffle away on broken joints, mouth drooling blood and the odd missed tooth. Big Mac simply followed her-without legs, she was fucked. In more than one way. She tried to ignore the sounds Twilight made fucking her sister's fresh corpse, trying to get to the closed door leading to the stairs. She didn't know how she'd get up them, or what she'd do...but she had to try. She wouldn't risk dying without trying her hardest, with out fighting them to the bitter end.

It didn't matter to anything but her pride, as Mac seized her broken ankle joint in his muzzle, making her scream in fright and pain, before he twisted his head. Although it did get her on her back, it ripped her hoof free. He spat it to the side-his instructions hadn't included that, after all.

"Mac, don't! E-even if you won't do it for me, do it for you! You really think Maud will let this go?! I...I can ask for her to go easy on you! I..." she trailed off, seeing the tears wetting his face, and realized he wasn't doing any of this on purpose. He was as much a victim as she was...and no doubt he'd suffer too. She sniffled, before nodding. "I forgive you," she murmured where only he could hear. "It's not your fault...but please...make it fast if you can't make it painless,"

He seemed to nod slightly, using his front hooves to lift her rump up, before thrusting into her ass so hard it ripped. She screamed, wailing in agony. But she knew it was best-surely, the more it hurt, the closer she'd be to dying. Unlike Twilight, she had no idea how much punishment a pony body could take before giving out.

Mac shoved his cock in, deep and violent, long enough to actual begin bruising the walls of her intestines. Twilight cast an xray spell so she could watch the thick meat ravage the depths of Limestone. "Good Mac, good! As deep as you can, I want to see if you can get in her stomach!" He humped violently, trying desperately to use the magic order on him to end Limestone as fast as he could. Twilight either didn't pick up on it, or didn't care. Instead, she watched, pleasuring herself with the corpse of her victim, taking deep, slow strokes into the ruins of Marble's womb.

The corpse's belly jiggled with the fat load of Mac inside it, Twilight enjoying the wet sounds and movement. She ran her hooves over the still limp corpse, running her hooves down to smush the teats about. She moved Marble so Limestone could see the alicorn cock defiling her sister, thrusts splattering cum and corpse cunt honey over the other two, Limey sobbing bitterly now. "Stop...can't you at least not do that?! Or not in front of me! You crazy bitch!"

"I could stop...but oooh...it just feels so good!" she moaned, wrapping her hooves around the corpses hips and shoving furiously in her ecstasy. She ran her hooves over the bruised, swollen flesh. "Look at her...I can hear her body coagulating in her body! S...so...so hot! Gonna cum!" she exploded cum deep inside, adding to the bloated tummy. She pulled out with a satisfied sigh.

"Well, Limey...you want to die, right? And it won't happen until I say so. So, you should do what I say so it does happen..." she smiled, almost apologetically, but felt she should get in some data about how a pony's mind broke just as much as their body. She pushed Marble to her sister's horrified face, dripping with multiple affections and blood. "And I say...eat her out. Deep. Get mouthfuls of that cumshake, and gulp it down."

Limestone began to fight, kicking Big Mac and trying to wriggle away with her broken legs. "No! I won't! Never, you can't make me, I won't!" she wailed, sobbing in pain, terror and misery. Twilight sighed, "Then I guess we can start taking the bits needed for cunnilingus off of you... Big Mac, start with her jaw. Work it free, nice and slow."

Limestone tensed, as Big Mac aimed a stomp, and began to knock her jaw off. At least there were no teeth to hurt too much during each stomp. The flesh began to pull away from her jaw and face, her jaw dislocating with a wet, meaty pop. Mac leaned down, taking her jaw in his muzzle, and slowly twisted left and right, loosening it even more. He pulled it free, placing it down next to her as she sobbed wetly, gurgling blood. However, she pulled Marble's corpse rump close, and began at least trying to eat her out.

Twilight nodded, "Good! Show me what a good little incest snuff slut you are, and I might let your suffering end," She sobbed into the corpse cunt, lubricating it further with her tears. She did her best to swallow the nasty concoction, but had little success with her tongue flapping about. Twilight straddled Marble's messy middle, sitting on it, sending a wave of gore and cum into Limestone's face who, to her credit, tried to gulp down as much as she could. Twilight pulled her head back, letting her use Marble's cunt as a pillow.

She looked to Big Mac, "Put your hoof in her, and don't stop until you come out her muzzle," she felt bad for the once strong pony-time to begin the end of her. That didn't stop her from casting a spell to see how the damage progressed as Big Mac's hoof did.

Mac pulled out, trying his best to get his regret and sorrow across. Limestone closed her eyes as Mac lifted her bottom, pulling out, and shoved his muscular, rough hoof into her already chaffed, bloody ass hole. She whimpered, trying to hold it in. Mac thrust deep and hard, as fast as he could. Soon she was coughing up blood, followed by chunks of her internals. Twilight watched with fascination, one hoof sliding to rub at her own soaked cunt. The spell let her see the progress of Mac's hoof and the damage done. Soon she didn't need it, Limestone gagging, puking up the food she'd eaten along with all her organs. The gore and vomit fulled her lungs, drowning her. However, Twilight sneakily cast a spell, keeping her alive and breathing, even if it was agony. She felt the worst about that one, but she had plenty of data, and a cunt that was basically a faucet.

She thrashed a last time, trying to empty her lungs, but finally her body hit its death throes, Twilight timing her own orgasm so she blew a load onto her face as Limestone died. Twilight moaned, rolling off, before moving the corpse sisters aside. Instead, she pulled out AJ's broken, flat body. She released Mac too, she could tell he was far too weak to fight her even if she wasn't an overpowered ruler. He collapsed, sobbing silently, mourning Marble and Applejack.

"Mac. If you don't want me to science more of your family...you'll do as I tell you," Mac looked up at her, hate in his watering eyes, but nodded slowly. "Good boy! Fuck your sister, and cum in her." he recoiled in disgust, looking at the flat pony, then at the mad scientist. "And, no...I won't be using magic to get you hard. You have to do this on your own...or you end up scienced, as well as your family...all of them, and you know I can do it. I'll make you watch for some of them before I experiment on you too." she was curious to see how far he'd go on his own with just that threat.

He trembled with fear and rage, but managed to stumble to AJ, taking her pulverized pelvis in his front hooves as he sat on his haunches. He pulled her to his crotch before pushing her away a few times, hesitating. Twilight simply watched-she wasn't on a time crunch, and honestly, the emotional misery made her as wet and hard as the physical misery did. She rubbed her cock with one hoof, the other rubbing her sopping pussy.

Mac closed his eyes, trying his best to pretend she was warm, alive, and willing. It helped, a bit. His massive cock slowly spilled forth. He took a deep breath, running his hooves over his sister's muscular flanks, ignoring any broken bones or flesh, pretending the blood he felt was sticky cum from an earlier session. To Twilight, it was kind of boring, but she allowed it...for now. Mac rubbed his cock between AJ's ass cheeks, before he slowly pressed into her cunt, shivering from the coldness enveloping him, and began to go soft. He sobbed, knowing if he couldn't do it, this crazy bitch would kill all of his family.

Twilight pulled the corpse away with her magic, Mac reaching for it with terrified, wide eyes. "Tsk tsk...far too soft to manage any of it, Big Mac...but that's okay," she said soothingly, as her horn glowed, placing the spell back on him, and teleporting a certain grey earth pony to them, still slumbering. "Because we still have so much to do while we anticipate your family's misery and end together," Again, she wasn't sure if she could-but that wasn't the point. He'd die thinking she did no matter what, and she petted his mane as Mac could do nothing but cry.