Twilight landed on the bedroom balcony of the Crystal Palace, keeping her invisibility spell up as she stealthily moved towards the door. She found it unlocked as promised and slipped inside before becoming visible again.
Inside she found her brother Shining laying on the bed in a casual ‘bread loaf’ position as he waited for her. He had a box next to him on the bed, and she wondered if that had to do with him telling her he wanted to try something new tonight.
“Hey there, my beautiful sister,” Shining winked.
“Ah, hey,” Twilight blushed. Even though they’d been involved since they were foals, it still felt embarrassing to sneak into her brother’s room for sex, especially now that she had to teleport cross-country to do it. “Is um… I mean your wife is out like you said?”
“You always call her ‘your wife’ when we do this,” Shining chuckled, getting up from the bed and trotting over to Twilight as she locked the balcony door behind her. “But yes, she’s gone on business for a few days. Just the two of us.”
“Sorry,” Twilight said, taking a brief moment to kiss Shining on the lips and lap their tongues together. “It just never stopped being awkward that I was… well banging a good friend’s husband, on top of you being my brother.”
Shining mm-ed into the kiss before responding, “Hey, we promised years back we’d keep doing this even if one or both of us married, til death do we part.”
“So uh,” Twilight shifted one hoof to rub another. “You said you had something new you wanted to try?”
“Well yeah,” Shining chuckled nervously as well. “It’s something me and Cadance have been um… doing for a while, but I was embarrassed to mention because it’s not exactly a normal fetish.”
“I’ll try it with you,” Twilight smiled gently at him. “Anything for my bbbff, promise, so no reason to be ashamed.”
“Ah,” Shining scratched the back of his head, actually shivering in either nervousness or pent-up arousal. It was much more than usual so he must have really liked it. “It’s… asphyxiation.”
Twilight tilted her head. “That’s a fetish?”
“Well yeah,” Shining gulped nervously and looked away. “We put a magic dampener on her horn, like me and you have done a few times for bondage, and I uh… hang her off the side of the bed, like with a noose, just enough to make her dizzy. I mean you’re both alicorns so you can actually go longer than the average pony, and even then ponies do this safely all the time… is my understanding at least.”
“Really?” Twilight tilted her head the other way, but nodded. She’d promised she’d try what he wanted after all, and she had no reason not to trust him, especially if he’d been doing it with Cadance. “Eh… sure. I’m game if you’d like to, though kinda hard to have a ‘safe word’ when one of us is choking.”
“Ah yeah,” Shining’s eyes darted about as if he hadn’t thought of that for some reason. “Well, we could just say flapping your wings is the safe word. I can always lift you with my magic at that point, not to mention you can hover.”
“Well… okay, I trust you,” Twilight smiled.
“Come on then,” Shining nodded. He was shivering as he trotted towards the bed, as if he was really into the idea.
It was a little surprising for Twilight, but also endearing. She trotted along behind him, taking a deep breath as she eyed his behind, then the box he had laid out on the bed. He took a horn restraint from the box, which just looked like a thick iron horn ring.
When he moved it to place it on her horn though, she felt her mana supply dwindle to a trickle before even her ability to use telekinesis was cut off. Unable to take it off herself, she was at her brother’s mercy, which always made her just a bit more damp. She knew he never would, but sometimes she imagined him betraying her while she was weak, and it made her a lot hotter than she’d like to admit.
Shining’s magic pulled Twilight towards the bed a bit roughly, and she giggled as she went limp, allowing him to use his magic to drag her over. He lifted her up, placing her standing upon the bed, facing the edge as he moved behind her. She felt her breath about her tail and hiked it up, her moist vulva giving him a wink.
Moving his muzzle to her nethers, he lapped deep, splitting apart her labia and pushing his tongue inside. He slurped loudly of her juices, moving his muzzle in a circle to massage her. He grinded his nose against her clit as he lapped deeper. He seemed eager, even more so than usual.
As he did so, he moved a long rope in front of her with his magic, winding it around itself to tie it into a noose in front of her. The other end moved up to a prepared hook on the ceiling, tying it there so that the noose hung above her, about where her head would be if she stood on her hind legs upon the bed.
“Did you ever get a coltfriend?” Shining asked between licks.
“Nah,” Twilight gasped at each stroke, rotating her hips back against his ministrations. “You and Daddy are the only stallions I’ve had inside me, and it’s the way I want it.”
“Did Mom ever find out you were having sex with Dad?” Shining chuckled and slurped again.
“Did Dad ever find out you have sex with Mom?” Twilight returned the question. Sometimes she wondered why both of them didn’t tell both their parents, but it just seemed so much naughtier not to.
“Well dang wish you hadn’t said that aloud,” Shining muttered, but continued his slurping at her nethers at the same time. “I suppose it’s my fault.”
Twilight flexed her wings out, unable to worry about why Shining had said that due to her impending bliss. A few more minutes of talented lapping later, she was bathing his face in more of her juice as she pressed her hips back against his face. He drank deeply of her hot pussy juice before pulling his wet face away.
Shining slowly mounted atop her, Twilight spreading her hind legs as he did so. Grasping her around her chest, he tilted her front half upwards, slowly standing her on her hind legs as he moved to his behind her. She could feel his shaft pulsating against her juicy pussy and groaned needfully.
As he moved her to stand on the very tip of her hind hooves, Shining slipped the noose around her neck, pulling it snug and adjusting it so that there was no slack between her neck and the ceiling. She felt a bit of anxiety at having it there, but in the end trusted him enough to put her life in his hooves like this.
He pushed his shaft between her snug pussy lips, stretching her out with his girth as he sank deeply into her passage. She moaned as he went all the way until his belly pushed against her rump, tip feeling snug against her cervix as if brother and sister were a perfect fit.
He then pushed his hips just a little further, Twilight’s hooves sliding off the bed. Suddenly all four hooves were off the floor and she felt the noose tighten. It cut off her air as she sank a few inches, feet shivering as her wings instinctively stretched out, but she didn’t flap them to tell him to stop yet.
“Are you sure this is sa-” Twilight began right before it completely cut off her air. She wheezed as the rope tightened around her neck, gasping as her wings started to shiver.
“Oh, it’s safe Twil-” Shining said before his own words were cut off with an mmph as he began thrusting into her. He grasped her hips, pushing his shaft up into her more roughly than she was used to, shaking her whole body and pushing it forward again every time she flailed her hind legs back to try to get a grip on the bed again.
As her face turned blue around the eyes, she felt him lean into the thrusting, pulling down at her hips to intentionally tighten the rope further around her neck. The plap plap of his body against hers grew louder as her pussy gushed more juice, almost like she was still in orgasm, but despite her body’s response, she was getting a lot more nervous.
Finally she gave into the urge and flapped her wings, the agreed upon signal for the ‘safe word’. He didn’t stop the movement, only grasping her hips harder and ramming himself higher, his balls bouncing beneath her with each thrust. She flapped again, thinking maybe he hadn’t seen her, sending a gust of air around the room.
“Shhh, just let it happen,” Shining whispered into her ear.
She wanted to tell him not to joke like that, but all she could do was attempt to flail, kicking all four legs pointlessly into the air in front of her as she strained to get a breath. He put all his weight against her, not allowing her to move back or get any grip against the bed as he stood on it.
Twilight felt her lungs burn in need of oxygen, and tried to parse what was happening in her mind. He couldn’t possibly be going to actually let her die, why would he do this out of nowhere? It didn’t make sense! But she was helpless, having put her life in his hands when she allowed the magic restraint to be placed on her horn.
“Oh Twilight,” Shining moaned behind her. “I’m holding it in, but I’m going to cum so hard when you die…”
Writhing about desperately, Twilight was finally certain that he really did intend this, even if she had no idea why. But it was too late, she was out of energy as every muscle burned from lack of oxygen. The ache spread through her as her vision grew dim, her labored heart thumping loudly in her head.
Finally she went limp, hanging on but completely unable to move. She felt him slide his front hooves around to her chest, feeling there as if to check for her heartbeat.
“It must be frustrating to die like this,” Shining groaned behind her. “All the things you wanted to do, all that snuffed out, but this is the way it has to be… to get me off harder than ever.”
What could she do? No one besides Shining even knew she was here! As her vision dimmed, she realized there was nothing to be done. This was it.
Shining clenched his teeth together, straining to hold in his cum as her pussy convulsed around him, for the first time unwilling to take her brother’s shaft. He’d wondered if he really could do this, but now he had to admit it was the hottest thing he’d ever experienced; he really was going to get off harder than he ever had before.
Then as Twilight’s empty eyes stared at the floor in front of them, he finally felt her heart flutter to a stop. The only movement now was her swinging against the rope with his own movements.
“Fuck, you’re so still,” Shining groaned. “Nnng~”.
He shoved himself firmly against her from below, blasting his load of seed into her pussy just as it was loosening from her death. He didn’t care if it lost its tightness, because the power trip of having just murdered his trusting sister made up for it by far. He coated her dead ovaries in his seed, backwashing out of her pussy.
A moment later, her death piss washed over his balls, spraying down on the floor and puddling there, bits of his sperm dripping into the yellow fluid to create beautiful white swirls. His orgasm finally came to a stop, and he just kept himself fully seated inside her, panting.
“You really did it,” said a voice from across the room. It was Cadance as she left the closet where she had been hiding to watch.
“Yeah it… was surprisingly hot,” Shining admitted. “And she died thinking it was my idea, just like you wanted.”
“It’s what the cheating whore gets,” Cadance growled. “And it’s what you get too, you’re lucky I consider you a prized possession or I’d be doing you now as well.”
Cadance lowered her head, taking a long lap up Shining’s balls, tasting the mixture of sperm and piss before tweaking her tongue against Twilight’s clit. As Shining pulled his shaft from her, Cadance moved her muzzle to cup over Twilight’s pussy, slurping deep of her husband’s sperm inside and drinking it out.
Shining went to pull back completely, but Cadance grabbed his shaft in her telekinesis, bringing it to push against Twilight’s rear entry instead. He obeyed her without question, pushing his tip into there instead. Even with her dead it was still tight, but allowed him in far easier than it would have otherwise.
Twilight’s corpse started to swing slowly again, the rope creaking at the strain as Shining began to pummel her tailhole. Cadance gave one more deep lap of the dead pussy before moving down to slurp at her husband’s balls, knocking them back and forth with her tongue as she giggled to herself.
“She mentioned you and your mother,” Cadance said quietly enough that Shining could barely hear it.
“Ah, yeah,” Shining flattened his ears, but didn’t dare stop thrusting into Twilight’s cadaver unless his wife told him to.
“Then I guess we have a milf to snuff too,” Cadance said as she took another slurp. “And you won’t complain either.”
“I won’t complain,” Shining claimed as he gripped Twilight’s waist again and really began pounding her ass harder. “But I would… diplomatically point out… that you’ve literally had sex with stallions we didn’t even know right in front of me.”
“But I had your permission,” Cadance growled. “Right?”
“O-of course!” Shining immediately regretted having made that point. All the same, his wife’s barely contained anger made his shaft throb harder, driving him more rapidly towards a third orgasm inside Twilight’s cadaver.
“And besides,” Cadance said between lips and nips. “I’m not your property, dear husband, but you are most certainly mine.”
“Yeah…” Shining grunted again, feeling himself on the very edge. “The way it should be…”
With that, Cadance slurped one of his testicles into her muzzle and bit down, sending a jolt of pain up through him as if to drive home her point. He groaned in pain, but also in bliss as he released into Twilight again in response. Twilight’s rectum was painted white on the inside as he unloaded the rest of what he could carry.
Finally Cadance released him, and he pulled back, a wash of cum leaking from Twilight’s limp ass as he moved down to stand on the bed again.
“Good boy,” said Cadance, moving her muzzle back.
“Now um,” Shining panted. “I guess we have to deal with the body.”
“I can disintegrate it with enough magic,” Cadance said. “And then… we’re going to talk about your mommy.”
