Twilight awoke with a start as the lights turned on. She didn't know how long it had been, but she felt rested well enough. Behind her, Shining groaned and covered his face with his hoof and shifted in the bed. Twilight felt him moving against her back from when he had been holding her during the night. But now she felt a very specific part of him prodding against her backside.
"Shining, wake up!" Twilight said. He moved his hoof away from his face and blinked at the crisp white lights in the ceiling. Her elbow to his ribs brought him fully to his senses, realizing the position he was in, and with whom.
"Oh! Sorry!" he muttered and rolled away from her, trying to keep himself covered. "Morning wood. Can't do anything about it," he said.
"Yeah well just keep it to yourself," she said.
"Gladly," he grumbled. His eyes focused and he looked around the room again. "Ugh, are we still here?" he said.
"Yeah." Twilight climbed out of the bed and walked over to the doorway they came in, feeling around for the seams. She couldn't find them. The same with the food door. She could see the outline of it but it had no means of being opened from the inside. She took a drink from the water fountain and Shining finally got out of bed, having gotten himself under control enough to be decent.
On the other side of the large window, a couple of the bipedal creature walked by. Each of them had unique clothing, unlike the others from the day before. Twilight and Shining both stopped what they were doing and just stood there, watching them. They looked at them, and they looked back. After a minute they seemed to get bored and moved on. Twilight and Shining moved closer to the window to see where they were going and a few more came walking down the hallway.
One was much smaller than the others. It walked right up to the glass and knocked on it. The two taller ones pulled them back away from the glass. The three of them stared at them for a few minutes. One of the tall ones held up a rectangle in its hand and flashed them with a light. Likely a camera flash. And then they moved on, looking into the other rooms. Twilight looked back and forth down the hallway at the other rooms and the creatures viewing them. Her eyes went wide and she looked back at her brother.
"This isn't a prison," she said. "It's a zoo!"
"And we're the exhibits," he said. Several of the creatures gathered outside of their window, waiting expectantly. The bell on the wall rang and the food door opened. The tray extended with two plates heaping with pancakes. "Feeding time," Shining mused. Twilight and Shining each took a plate and ate.
"It's weird having an audience," Twilight said, looking at the crowd on the other side of the glass. Aside from being forced to eat with their hooves, there was nothing particularly interesting about the way that they ate. Still, the majority of the crowd waited and watched until they finished. They placed their plates back on the counter and it retracted a few minutes later.
"Why aren't they leaving?" Shining asked.
"I don't know but I wish they'd hurry up. I need to use the-" Twilight didn't say 'bathroom' since there was no room to speak of. Just the standalone fixture. "The toilet," she said. She walked over to it and waited for the crowd to disperse so she could relieve herself. Several of them took out their cameras. "You've got to be kidding me. Shining, can you hold up a blanket or something?" she asked.
Shining grabbed the blanket from the bed and held it up with his hooves as best as he could to at least give his sister a modicum of privacy as she sat down.
"Should I hold my breath?" he asked, facing away from her as he held of the blanket.
"It's just number one," she said, covering her face in embarrassment with her hooves. After a long minute she was able to relax enough to go. Shining shifted his hooves in place, forced to listen to her.
"Did you um... eat asparagus before we left Equestria?" he asked once she finished.
"No. Why?" she asked. He cleared his throat.
"It's just very... strong smelling," he said. She scoffed and flushed. The wall behind her lit up with a marque of lights dancing in the pattern of a giant hourglass turning end over end. After a moment it turned into a red X with a harsh buzzer, scaring the daylights out of both of them.
"What the what!?" Twilight shrieked.
"Maybe you did it wrong," he said.
"How do you use a toilet wrong?" she asked. He shrugged.
"I don't know. You could get creative..." The screen went dark and as soon as it did, the crowd on the other side of the window dispersed. "The fuck was that about?" Shining asked.
"Apparently that's what they were waiting for," Twilight said, noting that they no longer had an audience.
"Weird," Shining said, tossing the blanket back on the bed.
"And what is that about!?" she said, pointing at his boner. "What at all about any of that was arousing?"
"Nothing!" He crossed his legs to try to cover himself. "It's not like I can control it. It's just does that sometimes. Besides, you're the one looking at it. See something you like!?"
"What!? No!" she balked.
"They why are you flagging your tail?" he asked.
"I am not!" Twilight looked back at her tail. It was indeed arched skyward. She blushed and willfully forced it downward to hide her modesty. "That wasn't deliberate. If I was in season, I wouldn't be able to help it. I don't have access to any potions or magic."
"It's not even spring," Shining said.
"Yeah. That's true. I don't know. Maybe it's the stress of all of this."
"I don't know. In the Royal Guard, the stress of basic training never gave me a boner. It was actually the opposite," he said. She shrugged again.
Without any clocks or the procession of the sun across the sky, it was difficult to gauge the flow of time. Their only indication was when the next meal time came along. The ring of the bell and the food tray emerging from the wall. Daisy and daffodil sandwiches for lunch. They ate and drank. Some more visitors to their window watched them eat and then moved on.
Shining was the next to use the facilities. After sharing the barracks he wasn't as modest about a need for privacy. He did advise that Twilight give him a wide berth. Thankfully, the exhaust fan mitigated the smell. Unlike with Twilight, he didn't have a crowd of spectators. Even so, when he flushed, the screen gave him the same reaction. A spinning hourglass and a red X with a buzzer. Less startling this time, but no less obnoxious.
The rest of the day was the same. The two of them trapped inside those four walls with nothing more than a bed, toilet, and a couple of chairs. The time only broken up by regular feedings. Shining broke up the monotony with an exercise routine, doing push ups, sit ups, and trotting laps around the perimeter of the enclosure. Meanwhile Twilight sat in a chair and recited novels as best as she could from her memory. Anything to occupy their minds and bodies. Often they did just as the bears across the hall, milling around aimlessly in their room.
They spent a good portion of their time observing the visitors that walked by their window. Or looking down the hallway in either direction to see what else was going on.
"The neighbors are fucking," Shining said nonchalantly, pointing at the room diagonal from them. It was two large quadrupeds. They were kind of like cows, except bigger and without fur. Their skin was course textured and pale grey, almost white. Their most distinctive feature was the large horn on their nose. And currently, one was mounting the other.
Shining and Twilight were hardly voyeurs. But it was something to break up the dull experience of the day. They stood there and watched along with the large crowd in the hallway with cameras. Once they finished, they all clapped their hands and slowly dispersed. Shining had another erection.
"Seriously? From watching that?" she asked with an arched eyebrow.
"No!" he covered himself with his hooves again. "I don't know why its so... active right now. None of this is a turn on. And stop looking!"
"I'm not!" She realized that she actually was, and purposefully averted her eyes.
Dinner that evening was vegetable stew.
Standing by the water fountain, Twilight noticed a white ring around the edge of the basin, similar to a hard water stain. Ever the scientist, she rubbed it off with her hoof she tasted it. It wasn't metallic or chalky, like lime, rust or calcium, which ruled out the usual plumbing sediments. It was bitter, like an alkaloid of some kind. The concentration of the powder on her tongue and gums sent a tingle through her body that seemed to settle and intensify on her genitals. The dull discomfort that she had been dismissing until then became an itch she could no longer ignore.
"Oh no," she muttered.
"What's wrong?" Shining asked.
"I know what this is, what this place is," she said.
"Yeah. It's an alien zoo," he said.
"With two of every creature?"
"... so they don't get lonely?" he said.
"Two of every creature saved from a doomed world." she said. He shrugged. "One male, one female. The last two of their species?" His eyes went wide after a moment. He came to the same conclusion she did. "It's a breeding facility!"
"But we're brother and sister!" he said.
"Do you think they would know that?" she asked rhetorically. She pointed at the water fountain. "And there's something in the water. Some chemical."
"Like what?" he asked.
"Something like Neighagra. Or Zesper. Probably both," she said.
"What's Zesper?"
"It's like Neighagra for mares."
"Oh. OH! Well that explains a lot," he said. Twilight followed his eyes and forced her tail to lower again. "Okay. So we just don't drink the water!" Shining said.
"Shining! How long do you think we'll survive without water?" she asked. He smacked his forehead with his hoof.
"Right. Right. So what do we do?" he asked.
"I'll... take care of myself, eventually," Twilight said with an implying tone. "I would think you should do the same."
The observation hallway cleared out and the lights turned off a short time later. They climbed into bed. He rolled over to hold her again, but his anatomy pressing against her back made her squirm away.
"It's not my fault!" he said.
"I know. But I think I'll sleep on top of the covers. I'm feeling too warm anyway," she said. She laid back down on the bed on top of the blanket. She did her best to ignore the tent pitched beside her. She waited for him to fall asleep. She knew she wouldn't be any time soon. Once she heard his telltale snoring she moved her hoof between her legs.
It felt weird doing it with her brother laying right beside her but the itch had become unbearable. Unlike her usual solo sessions, she made no effort to draw out her pleasure. She worked quickly and efficiently to get herself to cum. It wouldn't cure her induced heat, but it would help. For now.
She wiped her damp hoof on the covers. The whole room reeked of mare in heat. Shining groaned in his sleep and rolled toward her, humping in his dreams. She shoved him to roll the other way, facing the other edge of the bed. His dick poked out from under the edge of the blanket. She tried to pull the blanket over to cover him and he humped against her hoof through the covers. She held her hoof in place if only to keep him from falling off the bed and she passively gave him a hoof job as he humped in his dreams. His tip poking out from under the covers, flared, and spurted as he came, sending several thick ropes of cum splattering on the smooth floor beside the bed.
It served to relive him and his shaft retreated back into its sheath. But even though her own aroma still permeated the air, the heavy musk of his semen stuck out to her. It was all she could smell. She had to 'deal with herself' twice more before she was finally able to sleep.
The lights came on the next morning, giving them no chance to sleep in. Before breakfast was served, the large entrance door to the room opened and a couple of the creatures with the jump suits and batons walked in, followed by a few more, also in uniform. The ones with the shock batons shooed Twilight and Shining from the bed and kept them at bay in the corner while another two changed the bedding and another cleaned up the mess on the floor, collecting some in a test tube. There was some chatter between them and then they all left once the bed was made. The door sealed securely behind them.
"Room service, I guess," Shining said. Twilight pursed her lips in concern.
Breakfast was blueberry muffins. They made a point to drink as little of the water as possible. It wasn't too bad. The muffins were delicious and moist. But mindfully not drinking water only served to make them aware of just how often they had been drinking water. And willfully denying themselves of something had a way of making them want it more.
The first indication of dehydration was thirst. Obvious enough. The body's way of saying it needed water. After that came the dull headache that only worsened with time. Shining used the toilet, finding his urine to be a darker shade of yellow. Flushing resulted with the usual red X, and buzzer, followed by an exclamation point that persisted long after.
Outside in the hallway, a pair of creatures walked by in the jumpsuits. They looked at the exclamation point on the display and made a note on their clipboards before walking away. A short while later, the entrance door opened. The usual baton guards led, followed by another that walked over to the water fountain, pressing the button, and found that it was functioning just fine. They all left immediately after.
Lunch was a plate of peanut butter sandwiches. Shining was the first to break, taking a drink after his first sandwich.
"Shining!"
"Hey, I'm thirsty! I'll deal with the 'side effects' later," he said. Twilight followed suit, taking only enough of a sip to wet her mouth to eat. Her use of the toilet made another exclamation point, prompting another visit by the 'zoo employees', presumably. On the other side of the glass, they waited and watched until dinner was served. It was pretzels.
"I think they're onto us," Twilight said, looking at the very salty bread.
"Fuck it!" Shining grabbed a pretzel and ate half of it, taking a long drink of the cool, refreshing water, and then eating the rest of his dinner, getting his fill of carbs. Another liter of water and he could already feel his headache starting to melt away. A few minutes later and the side effects started to visibly kick in.
Shining walked over to the toilet and wrapped his hoof around his dick and started to jerk off.
"Seriously? Right now while they're watching?" Twilight asked.
"I don't give a shit if they watch, but do you mind?" he said indignantly. Twilight did an about face and looked away from him, watching the watchers watch him. As soon as it was apparent to them what he was doing, one of them banged on the glass. But Shining wasn't deterred, and ejaculated into the toilet.
The watchers hastily scribbled some notes and stormed off.
The entrance opened a short while later. The usual guards, except this time there were four of them with batons. The fifth one had a large ring that opened on a hinge. One of the guards separated Twilight away from Shining. The other three cornered him as the one with the ring tried to put it around his neck like a collar. He ducked and thrashed to avoid it but took a baton to the chest with a solid shock of pain. Resisting still, the next shock to his midsection paralyzed him and he crumpled into a heap. Twilight moved to help him, but got a painful shock of her own.
They put the collar on him and left. Twilight rushed over to him. He was alive and conscious, just unable to move until the shock wore off. The collar was sturdy metal and firmly locked in place. Without any tools or her magic, she was helpless to get it off him. The lights turned off and she helped him to bed.
Breakfast was hash browns with extra salt, forcing them both to drink plenty of water until their urine returned to a healthy hue, no longer setting of the toilet exclamation point alarm, even if the red X still came up every time.
Among the watchers that passed by, there was always at least one in a uniform watching them. After lunch, Shining's condition was too bothersome to leave alone. He walked over to the toilet and started jerking off. The watcher in uniform pulled a device out of their pocket and pressed the button.
Shining yelped as the collar zapped him. Twilight fumed and rushed at the watcher. She turned to buck the glass window with her hooves. She hit it with all her might, yielding a resounding thud, but the thick barrier barely noticed the effort. The watcher glanced at her but didn't even blink. He looked back at Shining who had recovered from the shock. Shining wrapped his hoof around his dick again to try to finish.
The watcher tapped the glass with the corner of the remote and pointed at the button with a finger. Shining glared at him, but stopped jerking off. The watcher pulled his finger away from the button, seemingly satisfied to find that the male pony was a fast learner. He put the remote back in his pocket and made a note on his clipboard.
"I guess they don't want you doing that," Twilight said.
"... fuck."
"Yeah. I think that's the point," she said.
Shining spent the rest of the evening waiting for a moment of privacy to deal with himself but it never happened. He paced about the room, uncomfortably stiff. Twilight doing her best to not look. Instead, she just glared at whichever watcher was on duty. Eventually it was lights out. Shining got under the covers and tried to very subtly jerk off in the dark. The watcher wasn't fooled. Shining got a fresh zap from the collar.
"I'll try distracting them," Twilight said. She walked over to the watcher and laid down in front of the glass, spreading her legs. She started rubbing herself with her hoof while she kicked the glass. "Hey! Hey over here!" she yelled. "I'm masturbating!" The severity of her arousal had her cumming in moments, spattering the glass with droplets of her marecum. The watcher glanced at her and then promptly ignored her. Shining tried to jerk off again and was immediately shocked.
"This is completely unfair!" Shining yelled. "You're allowed to get yourself off but I can't!? This is unbearable!" He tried to jerk off again and got shocked. He tried to keep going through the pain but couldn't. "Twilight! You've got to help me! Please!" he whimpered in agony.
Twilight walked over to him and the watcher shifted to see what she was doing. He activated a signal and several more uniformed watchers gathered outside the glass.
"Twilight, you do it. They can't shock you," he wheezed. "I know I'm your brother, but please! I'm in pain!" Twilight hesitated briefly but nodded. She put her hooves on his dick and started jerking him off. As soon as it became clear that he wasn't going to engage in intercourse with her, Shining got shocked.
"Shining!" Twilight cried.
"Keep going!" he growled through his grit teeth. "Finish, no matter what!"
She kept jerking him off and he got shocked twice more. At last he flared and ejaculated all over the mattress.
"Thank you," he whimpered through his tears.
Twilight charged at the glass and kicked it until her hooves were sore. The watchers simply looked disappointed and took some notes before walking away. The rest of the zoo remained dark as the light in their room turned on. The door opened and a half dozen guards with batons walked in. Shining was too weak to move as the converged on Twilight.
Twilight took an aggressive stance and readied to charge. They pulled on the batons and they telescoped to triple the length. More like spears. Two of them closed the distance and both gave her a solid jab. She collapsed like a sack of potatoes. Another one walked in and fitted her with the same collar.
While both ponies were incapacitated, the bedding was changed again and they were both laid on it. Then all the watchers left them to sleep.
Breakfast was waffles and assorted fruit. Juicy enough that it didn't leave them dying of thirst, trusting that they knew better than to avoid drinking the water again. Again, they spent another day under constant surveillance. Testing the rules, Twilight openly masturbated again, and was freely allowed to do so. All it managed to do was make the room stink of mare in heat, exacerbating Shining's condition as he paced back and forth.
"Could you NOT!?" he shouted at the mare as she writhed on the bed in the agony of the worst estrus she had even experienced in her life, drenching the sheets with her sweat and pony-knows-what-else. "It's like you want me to rape you!"
"If it was literally any other pony, YES! I would kill for a good rutting right now!" she growled with equal hostility, looking at the watchers on the other side of the glass. "It's obviously what they want." She struggled to even think through the overbearing haze of her heat. Even so, she still managed to get an idea. "Wait, that's it!" she said.
"What? What's it?" he asked.
"Get under the blanket with me and mount me," she said.
"You can't be serious! I'm not doing that with you!" he said.
"We're not actually going to do it! We just need to make them think we're doing it!" she said. "The blanket will cover us, so you can put it between my legs, underneath me, and I can use my hoof," she explained. Shining's dick had been so hard for so long that it hurt.
"Fuck it! It's worth a try," he said.
He got under the blanket with her and mounted her like she said, sliding his dick between her legs, against her belly while she stroked him with her hoof. From the outside it looked exactly like intercourse. Several watchers gathered in front of the window. It didn't take him long to finish. His tip flared and he spurted onto the mattress under Twilight.
"Sweet release!" he cried out, practically collapsing on top of her, panting in relief at last.
The crowd of watchers on the other side of the glass began to clap their hands. After a while they dispersed until none remained. They were alone at last.
"Well, that works at least," Twilight said.
For lunch they were rewarded with a sumptuous banquet of food for them to choose from. After they ate their fill, the regular room service crew came through. Twilight and Shining kept their distance at the far side of the room while they worked.
The one that gathering up their linen noted the large semen stains and pointed it out to the others. There was a quick exchange of words between them and fresh blankets were not placed on the bed, leaving them with only a bare mattress when they left.
Dinner was a plate of home fries with extra salt.
"Shit. I really thought that trick would have lasted longer," Twilight said.
Shining's condition was just as bad the next day. Twilight used a new technique. She faced the glass wall and kept her front half down against the ground. Shining mounted her from behind and her body obstructed their view of his dick under her belly as he humped. A couple of the watchers moved to either edge of the window to look at them from the side. One started frantically started tapping the window, saying something to the others. The jig was up and the both got a powerful shock from their collars, leaving them immobile.
Several of them came in through the entrance. A couple of them lifted Shining off of her. The others moved her limp body over onto the edge of the bed. One of them had a pair of shears and cut her tail hair down to her dock, leaving her with a bobbed tail and nothing to cover her marehood.
"Twilight," Shining groaned.
Then the others carried Shining over and placed him on top of her. His body was anything but limp, as they used their hands to guide his penis.
"Shining," Twilight whimpered. They spread her vagina open rubbed the tip of his dick against her very wet pussy and pushed it inside as the team heaved his hips forward. She grunted as his blunt tip pushed against her cervix once he was completely hilted inside his sister. Once he was properly in place, they all exited the room to let nature take its course.
Twilight's hoof twitched as she slowly regained control.
"Get off," she said.
"I'm trying not to," he said.
"You know what I mean," she said.
"Working on it..."
The large crowd of watchers outside raised their cameras to record the miracle of new life. Shining struggled to get his legs under him to support his weight. With all of his strength, he pushed himself away, falling backwards and pulling out of her. For his efforts, they were both rewarded with another debilitating shock. The team came into the room again and re-positioned him as they had before, making sure to get his penis as deep into her vagina as they could. Then they affixed straps around their torsos, and legs, keeping him firmly connected to her and no way to even budge.
One of the watchers put on a long rubber glove.
Twilight heard Shining shriek and whimper and she felt his dick start to twitch inside her.
"What are they doing!?" she asked.
"Making finger puppets in my ass!" he cried. The fingers in his ass massaged his prostate, working on milking it while the other hand gently massaged his heavy, full balls, coaxing them to release all of the built up virile sperm.
Twilight felt his dick throb harder.
"Shining!" she cried. Shining could only whimper in response. She felt him start to flare inside her. "Shining!"
"S-sorry!" he cried. His balls tightened and his penis began to pulse and throb. The first blasts of cum instantly filled what little space was left inside he vagina. The fingers in his ass milked his prostate faster as a couple other watchers pushed his hips against hers harder, forcing the potent semen through the narrow opening of her cervix, and keeping his tip squarely against it as it continued to spurt load after load directly into her fertile womb.
His dick continued to pump and twitch as he came longer than he ever had before, getting every last sperm out of his balls with a gentle squeeze from his handler and a final few strokes of the finger against his prostate. Shining was utterly spent. The fingers left his ass and the gloved hand gave a thumbs up to the crowd on the other side of the glass. There were several camera flashes and a roar of applause.
Shining felt mortified. He had just fucked his sister and she was all but certainly pregnant. One of the watchers gave Shining a small injection in his thigh. What little his erection had started to wilt was undone as he was back to full mast, flared tip and all. Twilight and Shining were still strapped firmly together, with his dick still deep inside her, keeping her plugged from letting any semen leak out. The team lifted them together and laid them on the bed with a fresh mattress cover, sheets and blanket to let them sleep.
When they woke up the next morning, they were still cuddled together with his dick inside her, but the straps were thankfully gone, along with the shock collars. Twilight disentangled herself from him and limped past their breakfast, over to the toilet to pee. At least the burning itch in her loins was gone.
She no longer cared about the massive audience of watchers on the other side of the window. She sat down and peed while several cameras flashed. She got up and flushed, bracing for the loud buzzer. The animated hourglass spun and then a green check mark appeared with a 'ding'. The audience cheered and there were more camera flashes. Shining finally got out of bed to all the commotion and shuffled over to the breakfast counter.
"Well I think you know what that means," she said, grabbing a plate with a tall stack of pancakes.
"Yeah," he said, pouring some syrup over his pancakes. "You're eating for two, now." She nodded. "Are you okay?" She shrugged.
"What's done is done. They got what they wanted. Hopefully this means they'll leave us alone for a while."
"Yeah." Shining chewed on a mouthful of breakfast beside his sister. "I'm sure you must feel better at least." Twilight snorted. She couldn't deny that she felt infinitely better now that her estrus was over. "I feel better too," he added. "Being blue-balled like that was not fun."
"Yeah. I'm glad you're not hurting anymore," she said.
"Likewise."
"And... you know... aside from getting electrocuted and the butt spelunking... it wasn't so bad."
"Well sure, when you put it like that," she said.
"I'm just saying..." he leaned over and put his hoof on her tummy. "If this was inevitable, it would have been nice if we could have done it on our terms."
"Yeah. That would have been better," Twilight agreed.
"And if they want us to repopulate our species, I doubt this will be the only one they want us to have," he said.
"Yeah..." she nodded.
"And really, we have a responsibility to ponykind," he said with a coy eyebrow.
"Okay. So when the time comes for me to get pregnant again, we'll play along. On our terms," she said with a smirk.
"Yeah. When the time comes... But I guess what I'm trying to say is..." He trailed off.
She looked at him. He leaned over to kiss her, and then smiled.
"... why wait?"
