Rainbow Dash answered the thud at the front door of her cloud house. "Morning, Derpy." The mailmare shook off her daze from the collision and gave Rainbow her mail. Back inside, she sorted through the envelopes, tossing most in the trash. "Let see, bill, bill, somepony wants to make my wings 20% bigger... bill, oh!" Dash pulled out an envelope from her parents. It was a letter telling her to come to their house as soon as she was able. "Ha! Easy! I can be there in no time flat!"
Will all undue haste, Rainbow Dash zipped across the skies from Ponyville to Cloudsdale in near record time. She knocked on the door of her foalhood home and pushed the door open. "Mom? Dad?"
"In the kitchen, dear," her mother, Windy Whistles called out.
"Are you here about the letter?" her father, Bow Hothoof asked as he trotted down from the second floor.
"Yeah. What's this about?" Rainbow asked, waving the letter as they walked into the kitchen. "You said you wanted to talk to me directly."
Bow gave his wife a nervous glance. Windy pulled out a chair at the table. "Why don't you take a seat," she offered.
"Why? What's wrong? Are you sick? Is Dad dying!?" Dash asked.
"No, no, it's not that serious," Bow said, before biting his lip and wondering if perhaps it was.
"But it is serious," Windy added, sitting down beside her daughter. "We have some bad news. Your brother just got out of prison today."
Rainbow Dash's expression went blank. The sound vibrations in the air from Windy's voice made it into Dash's ears. She heard the words. But somewhere in her brain there was a disconnect. "Wait... what?"
"Your brother just got out of prison today," Windy repeated. "We didn't expect it to be so soon, but apparently he got a reduced sentence on good behavior. We tried to fight it but-"
"But- But I have no brother!" Rainbow shouted.
"You do. You just don't remember. After he raped you-"
"WHAT!?" Rainbow shrieked.
"It was a bit after you got your cutie mark," Windy said.
"I remember getting my cutie mark!" Rainbow said. "I would remember having a brother. And I definitely would remember getting r-... That happening to me!"
"Of course you would!" Windy said. "Something like that would have scarred you for life! You were a mess. That's why after he was sentenced, we had your memory of it removed."
Rainbow held her head with her hooves. "Removed!?"
"Not, like, surgically," Bow said. "It was a spell to lock away the memories of what happened so they wouldn't affect you. And look at you now! You're a success in every way possible! We even had to turn his old bedroom into your trophy room."
"That was his bedroom?" Rainbow asked. They nodded. She got up from the table and walked to the trophy room. It looked just like it always did. But something about it felt off now that she knew. Windy led Rainbow to the master bedroom and dug into the back, bottom corner of her closet for a small lock box, setting it on the bed. Bow grabbed the key for it from his nightstand and opened it. Inside were a few photos and documents. Aside from some paperwork lost in some filing cabinet hidden somewhere in Cloudsdale city hall, it was almost the only other evidence that this pony even existed.
Rainbow Dash looked at the old photos of her as a filly and the colt she was playing with.
"He looks just like me," Dash said.
"Well you were twins," Bow said. He pulled one of the photos off the wall. It was Windy holding an infant Dash in her hoof in the maternity ward the day she was born. He pulled the photo out of the frame and unfolded it, showing the other infant in her other hoof. "We did everything we could to put all our effort into making sure your life was extra good."
"You just... erased him from your life?" Rainbow asked.
"What he did to you was unforgivable!" Windy said with an angry edge to her voice. "Doing that to his little sister!"
"Wait, I thought you said we were twins."
"Well he was born before you by a few minutes, so..."
Rainbow Dash looked at the other photos of her brother a bit older. She couldn't remember him at all. But she felt a pang in the bottom of her gut. An anxious fear like she had just walked out of a market with something taken in her pocket. Like she was going to get caught. It felt like guilt. But it was irrational. It made no sense.
At the bottom of the lock box was a birth certificate. Rainbow read the name aloud, "Prism Blitz." She looked at her parents. "So where is he now?"
Bow took an opened envelope out of his bag. "We got this letter from the Equestrian Penitentiary. After he was released, he was transferred to this halfway house in Fillydelphia." He showed Dash the address in the letter. "Far, far away, to await a public works contract through the city."
"We can't send him back to prison," Windy said. "But we are working on getting a restraining order against him for you. Once we get that signed by you, he won't be able to even be in the same town as you!"
"We didn't even want to tell you about him," Bow said.
"But we felt that you ought to know, for your own safety," Windy added.
"Right..." Rainbow Dash looked back and forth at his name on the birth certificate, and his photo, unable to shake that queasy feeling in her gut.
"Twilight, remember when you used that memory spell after Discord came back that first time?" Rainbow Dash asked.
Twilight Sparkle rubbed the bridge of her nose. "For the last time, Dash, that only works on recovering memories you actually made. And your brain doesn't do that when you get blacked-out drunk!"
"No, it's not that this time," Rainbow said. "I need you to help me recover my memories from a long time ago."
"I'm not sure what I can do for you. Your brain is still developing as a foal. So your memories from before you get your cutie mark are going to be spotty no matter what. And nopony can have perfect recall."
"No, it's from after my cutie mark," Rainbow explained. "But they were locked away with a spell."
Twilight gave her a concerned look. "Who did that to you?" she asked and immediately realized, "Wait, no, I suppose you wouldn't remember. But mind magic is very strictly regulated! Whoever did that to you is in serious trouble."
"My mom said it was court ordered," Rainbow said.
"Oh. Well that's different. Did she say why?" Rainbow Dash nodded silently. "Are you going to tell me?" Rainbow bit her lip nervously. "Dash, I can't help you unlock a memory if I don't know what I'm looking for."
Rainbow shuffled her hooves for a second. "It's... about my brother."
Twilight's eye went wide. "I didn't know you had a brother."
"Well, apparently I do."
"And there was a court order to have your memories of him locked?" Twilight asked. Rainbow nodded. "Dash, there's usually a reason for that. If something traumatic happened when you were a little filly it could have-"
"Yeah, I know!" Dash said with a bit more anger than she meant. "But I don't know! And that's what's bothering me right now! Something feels wrong! And I need to know! I need to know what happened!"
"Take it from Luna," Twilight said. "She has seen the dark corners of ponies' dreams. There are just some things better not knowing."
"You can-" Dash tried to say. "If- if it is bad, you can always lock it again, right?"
Twilight gave a nervous shrug. "Eh, yes and no. Mind magic is a dice roll every time. The mind has some plasticity. You can bend it a little a few times. But too much or too many times will break it eventually. And there's no fixing that. No matter how careful you are, eventually the success rate drops to zero. It's one of the reasons why mind magic is so strictly regulated. Do you understand?" Rainbow Dash nodded. "Are you sure you still want this?"
The knot in Rainbow's stomach twisted a little tighter.
"Yes."
"Okay. Hold on." Twilight's horn glowed as she focused the spell. She took her time with it, making sure to only use the exact right amount of magic to pick open the mental lock, not smash it to bits. The aura from her horn moved out and washed over Rainbow Dash's head.
Rainbow blinked, and then blinked again, as though she was waking up from a fitful dream. She started crying at once. Not bawling out loud. But silent rivers of tears poured down her cheeks like she had just been sprayed with onion juice. The knot in her stomach spun and twisted itself up into a massive ball of twine and Rainbow keeled over, falling to her knees with her mouth open in a silent wail. Her throat felt like it was closing up, too pained to even cry out.
Twilight panicked. "I'm sorry Rainbow! I- I can undo this! I can lock it again!"
"NO!" Rainbow screamed, putting her hoof up to stop her. "I remember everything! I need to fix this!" In a flash she was back on her hooves and sprinting for the door.
"Dash, wait!" Twilight yelled after her. "Where are you going!?" But Rainbow Dash was already flying away fast enough to outrun the sound of Twilight's voice.
Four walls and a cot.
That's was prison was, mostly. Four walls and a cot. Or three walls and a barred door. Maybe even a little barred window. But mostly it was four walls and a cot.
The Fillydelphia halfway house was about the same. Four walls and a cot. The room was bigger than a prison cell. If only a little. The cot was a little nicer. But it was about the same. At the end of the hall was the communal bathroom with toilets and showers. One of the wash basins even had a mirror.
It was too good for a piece of shit, Prism Blitz thought as washed his hooves. He looked down at his hooves in the sink. What a piece of shit. You're a piece of shit, you know that? Don't ever forget that you're a piece of shit. He looked up at his reflection in the mirror. Yup. You still look like a piece of shit. Go back to your room now, you piece of shit.
Prism Blitz shuffled back to his room. Four walls and a cot. He sat on his cot and stared at the wall, waiting for his work orders to come though.
Or until he died.
You know, whichever came first.
~
Rainbow Dash double checked the address she had written down, and looked at the number on the building in front of her. The rusty plaque said Fillydelphia Reintegration Authority. With a little work and TLC to spruce up the place, it could almost be capable of looking like a crack den.
She turned the knob on the entrance door and the jam fell out of the frame. The room numbers in the hallway went up one side and came back on the other. The one she was looking for, room 6, was just inside the building entrance. She took a deep breath and knocked. She heard the creek of furniture inside and the door slowly opened. And then, standing before her was a shadowy reflection of herself. The other pony had the same colors as her, though his features were more rugged. Very much a stallion.
He looked at her with his mouth agape, unable to believe what he was seeing. Surely he was hallucinating. It wasn't her. There was no way it was her. It couldn't possible be-
"Hi- hi there," Rainbow stammered. "I- I'm Rainbow Dash."
It was like she had pulled a knife on him. His eyes went as wide as dinner plates and the color drained from his face. He stumbled backwards and fell to the floor. His hooves scrambled and he whipped around to right himself and sprinted away running headlong into the far wall, screaming bloody murder the entire time.
Rainbow Dash panicked and looked up the hallway. But none of the other residents so much as even looked out their doors. Nopony was in this place because their lives were going so good. Random screaming was not uncommon.
Prism Blitz shoved his cot aside and dove behind it for cover, cowering in the corner, trying to make himself as small as possible and covering himself with his hooves, as though she were an assassin sent to murder him.
"Hey! HEY! Stop it! It's okay! You're fine! I'm not gonna hurt you!" Rainbow yelled over his screams. He stopped shrieking but stayed where he was. His entire body was shaking as though he had just been pulled from an icy river. From behind his hooves, a single eye peeked at her. His pupils had shrank to pinpricks. He clenched his eyes and grimaced in pain just from looking at her.
"What happened to you?" Rainbow asked.
The stallion tried to speak. "I- no! You- You can't be here! I'm bad!"
"No! No you're not!" Rainbow said. "I got my memory back! I remember what happened! You didn't do anything wrong!"
"No- I- I'm bad. I'm a bad pony. I lied. I made you lie," he said, keeping his eyes shut.
"Hey, look at me," Rainbow said.
He shook his head. "It hurts. It hurts to look. I got zapped. They zapped."
"What do you mean?" Rainbow asked. "Come on, talk to me!"
"The- the doctors. They made me look at- your picture and- I got zapped."
"They would torture you?"
He shook his head no. "Correct. They would correct me. If I let them- correct me, I could leave prison early."
"You didn't deserve that! You didn't deserve any of this! You didn't do anything wrong!"
He shook his head. "I'm bad. I made you lie."
"No you didn't!" Rainbow said, sitting on the floor with the cot between them. "I remember now! I tried to tell them, but they didn't believe me! I tried to tell them you were innocent! But they thought you had made me lie for you. But you didn't! I know you didn't!"
"But everypony-"
"Convinced you that you were a bad pony for years! And erased my memory of you!" Dash said angrily. "Nopony could believe that I was the one that initiated things and they all assumed you were a rapist! But you're not! You never were! I loved you, Prism!" He started to cry. "I love you!"
Prism had nightmares like this before. Dreams of forgiveness and then pain. "No. This isn't real. You're not real!"
"I am real," Rainbow said. She reached across the cot and put her hoof on his. He jolted upright and pulled his hoof away as though she'd stuck him with a hot poker. She took his hoof again and made him look at her. "I'm real, and I'm really here. I'm sorry this all happened to you. I didn't even know about it after they took my memories. But I'm here to fix things now. And I'm not leaving you in this place."
She stood up and pulled him up by his hoof to stand. "Come on," she directed him, moving the cot out of the way. He took small, nervous steps, fearing that any sudden movement my shatter this happy dream and he'd be strapped back in that electric chair getting shocked for it.
"It's okay. You don't have to be scared," she said. "We're leaving."
She stepped out into the hallway and he stopped at the doorway. "I can't go. I have to wait here for my work orders."
"Screw that!" Rainbow said. "You're coming home with me! I have Wonderbolts money. I'll take care of us until you can get back on your hooves. Okay? Grab your things." Blitz looked at the bare room with only the bare cot in it and shrugged. "Okay, never mind then. Let's just go." She fought for every step, pulling him by his hoof to get him outside. He turned to look at the building. "No. Don't even look back. That dark chapter of your life is over!"
At the Fillydelphia train station, Rainbow bought two tickets and got them onto the train to Ponyville. She would have preferred to fly home with him, but he looked like he was having enough trouble just walking. He sat across from her on the train and just stared at her uncomfortably. Still scarcely able to believe she was real. He kept expecting to wake up.
Rainbow Dash was no better. It was like she was sitting across from a ghost. It felt like she was only just meeting him for the first time ever, and at the same time it was somepony she had known her whole life.
"We... we used to do everything together..." Rainbow said. "Remember? When we were little? We used to play in the mud puddles when it rained and we'd get so messy. Dad made us wash off with the garden hose before we could go in the house. And you did that thing where you sprayed the water in the air and made an updraft with your wings and it would make a rainbow! And that was how you got your cutie mark!"
He nodded. "Yeah."
"And then I got my cutie mark when I did a Sonic Rainboom for the first time! When I was racing for Fluttershy's honor." Rainbow's eyes lit up. "You remember Fluttershy, right?"
"Yellowshy?" he asked.
"Eh, close enough. I wonder if she remembers you... I'll have to ask her when we get home." Rainbow's mind wandered a bit more. "Remember the day that I dropped out of flight school?"
"I- you- you asked me to... leave school and go with you- home," he said.
"You remember what happened next?" she asked with a grin.
"I- we-" his eye twitched and he winced as though trying to remember hurt.
The two of them were sitting well away from anypony else on the train. Even so, Rainbow leaned closer and lowered her voice to a whisper. "We got home early from school, and we caught Mom and Dad doing the deed upstairs," she said. "And I talked you into trying that with me. "
"They- they said- they told me that I forced myself on you," Blitz said.
"Is that what you remember?"
He stared at the floor and shrugged. "I don't know."
"Well I do know!" Rainbow said with conviction. "I remember it clearly now. It was my idea and it took a lot to convince you to even try it because you were so nervous. But afterwards I remember how much we had both enjoyed it and we did it a lot more." Rainbow Dash's smile faded. "Until we got caught. And that was my fault, too. You were always the sensible one. Always wanting to play it safe and I kept wanting to take more and more risks and thrills." Rainbow rubbed her face with her hoof. "I was such an idiot!" Rainbow reached across and held his hoof. "But I'm going to fix that, starting today."
Blitz looked back at her. Still a bit unsure, but he nodded. She leaned over and hugged him. She could feel the ridges of scars crisscrossing his back beneath if fur. She could only imagine what from. But she knew that ponies that went to prison for the particular crime he was accused of were not treated well.
Rainbow Dash's cloud house hovered on the eastern side of Ponyville, close enough to the train station that they didn't have to walk through the middle of town. It was just as well. She just wanted to get him back home as soon as possible. It was a strange feeling for her. To have him back, it was so incredible as to be an unbelievable dream come true. But just knowing even part of what happened to him made her so angry. Much of it was directed at her parents that didn't believe her. But mostly it was for all the time they lost.
He followed behind her, sensing her getting upset. Rainbow looked back at him and realized how she must have looked with her furrowed eyebrows. "I'm not mad at you," she assured him. "I'm mad about what happened to you, okay?" He nodded. They arrived in the shadow of her cloud house. "Well this is me," she said. His eyes followed hers upwards. "Think you can make it up there?"
Prism spread his wings nervously and gave a few experimental flaps to no avail.
"I guess prison isn't a place for flying," she said, realizing that he had been out of practice for years. "Don't worry fam, I got you!" She lifted off and hovered over above him before wrapping her hooves around his midsection to carry him up. Blitz felt the incredible weightlessness of flying as the ground fell away from under his hooves. A moment later she set him down on the cloud yard of her home. It was impossibly soft against the course pads of his hooves that had only known cement floors for the last decade.
"We're gonna work on the flying thing later," she said. "If I can train Twilight how to fly, I can train anypony! It's gonna be so fun to have a new flying buddy! But first-" She opened the door to her home and waved to invite him in.
Prism Blitz walked inside and looked around. Rainbow Dash was very much a pony in love with herself and it showed. Everywhere he looked, he saw her in some form or another from molded trophies to Wonderbolt posters. He was surrounded by the very images he had been made to associate with fear and pain.
Rainbow Dash could sense his unease. She slowly draped her wing over him. "Hey, it's okay. It's going to be okay. You're safe now. You're home now." She led him over to the couch and she sat down beside him, scooting over to press her flank against his.
"You know... even while my memories of you were locked away, I still had this... feeling inside me," she said. "Whenever I looked at my friends who had a brother, like Applejack, or Twilight, or even Fluttershy, I would get so envious." She blushed. "I would always imagine what it would be like with them fooling around. Especially with Zephyr Breeze moving back in with Fluttershy. And you know he's the kind of stallion that would just 'forget' to pull out! All those 'royal meetings' that Twilight goes up to the Crystal Empire for. And Big Mac- hoo! In fact I'm pretty sure Apple Bloom is Applejack's daughter. I have a whole conspiracy wall upstairs about it with photos and documents and red yarn!" Rainbow Dash looked at her brother and he just looked back at her with a blank stare. Rainbow Dash smacked herself in the forehead. "Oh, yeah, you have no idea who I'm even talking about."
"I kinda remember Fluttershy, but-" he said.
"Yeah, no sweat! I'll introduce you to all my friends later!"
"Actually," he interrupted, "I don't think I have the energy for that. I'm pretty tired. Today has been... just, exhausting! I'm still just... trying to process all this."
Rainbow glanced out the window. It was already getting late in the afternoon. The sun would be setting soon. "I got you! Lemme just..." she zipped around the room. "Let me get the bed made up for you!" She ran upstairs to her bedroom. Her bed was an unmade mess of blankets protected by a pile of work clothes and uniforms that needed to be washed. She shoved the mess off the bed and grabbed a pillow to muffle her squeal of excitement. She had her brother back. She wedged the pillow between her legs and humped against it without finesse or purpose.
It didn't help that it was the height of the spring heat. Not that she needed any more of a reason to be any more horny. After so many long nights of fantasizing about what it would be like to have a brother of her own, it was finally real. It always had been. And even with her memories of him locked away, those feelings remained in her heart. That wild, unbridled lust that she thought would always just be a fantasy. But it all made so much sense now.
"Whoa..." She dismounted the pillow, now quite damp. "I guess I was more excited than I thought." She put it back at the head of the bed and neatened up the sheets to make it look like she wasn't a massive slob of a single mare. She felt her face flush. Her flagged tail swished from side to side to try to fan her wet nethers. She took a few deep breaths to compose herself and went back downstairs.
"The bed's ready," she announced. "Are you sure you don't want some kind of dinner?"
Prism shook his head. "No, that's okay."
"What about something to drink?" Rainbow dashed into the kitchen before he could answer and came back a minute later with two mugs of apple cider. "I bet they don't have this in jail!"
Prism politely accepted the drink and took a sip. He coughed. "It burns!"
"Yeah, it's hard cider," she said. "Wait, if you went into juvi, does that mean this is the first time you've ever had alcohol!?"
He looked at his drink. "I guess."
"Cheers! I'll drink to that, bro!" Rainbow lifted her drink to tap it against his before guzzling it. He drank his slowly, still getting used to the sensation. "Are you sure you're not hungry? I mean, look at you! I run pretty aerodynamic, myself, but you look like you just crawled out of the San Palomino Desert! This stuff it gonna topple a lightweight like you!"
"It's okay. Really."
"Fine. But you gotta promise me that you'll let me cook you an Awesome™ breakfast then!"
"Heh. Yeah, okay."
"Cool!" Rainbow Dash sat and waited impatiently for him to finish his drink. "Alright, you ready for bed?"
Prism gave a couple slow blinks and a hard sigh. "Yeah."
"Alright! Let's go!"
He looked at her. "You don't seem too sleepy."
"I said let's go to bed!" She grabbed him by his hoof and pulled him along upstairs. "I never said anything about sleeping!"
"Wait, what!?" Rainbow Dash pulled him into her bedroom and all but threw him onto her bed. She crawled onto the bed with him, licking her lips with a predatory grin. "If not sleep, what are we going to do on the bed, Dashie?"
Rainbow felt her knees get weak at the mention of his old pet name for her, and wetness dribbled down her inner thigh. "Well the way I see it, we'd have kept on doing it every day if we hadn't of gotten caught. And we have a lot of days to make up for."
Prism Blitz tried to resist, but her entire bedroom stank like a mare's locker room. All he could smell was her pussy. His every breath of air was heavy with her pheromones. He felt a stirring in his loins that he hadn't felt in ages. Arousal.
"Oooh..." Rainbow mewled, noticing his physical reaction. He quickly rolled over to hide his shame. His face pressed into her pillow, soaked in her juices, magnifying the effect a hundred fold. He was scared at first. This combination of stimuli and getting an erection had been met with electrical shocks in the past. But now-
"Oh? Whoa! What's this!?" Rainbow Dash was on top of him, pulling him to roll back over onto his back. She looked at the tip of his shaft emerging from his sheath. "Is this for little ol' me?" she asked playfully.
"N-no!" he tried to protest. "I'm not getting aroused by my sister! It's wrong! It's wrong for a brother to get turned on by his sister!"
"I don't know," Rainbow teased. "It looks like you're getting turned on right now..." She straddled his lap and put her hoof in her crotch, rubbing herself. "Relax, Prism. It's not wrong if we don't put it in." Her hoof rubbed her clitoris as she scooted forward to pin his growing shaft against his belly and rub her pussy against the side of it, getting it nice and wet.
"But I'm your brother!" he said.
"Keep telling me you're my brother!" she cried as she clopped herself silly.
"But I AM your brother!" Prism said.
"Oh yes! Keep saying that!" Rainbow just clopped herself harder on top of him.
"This is so wrong!"
"Yes! Oh fuck yes!" She rolled and bucked her hips back and forth against the side of his medial ring feeling the pressure building up inside her. "Ngh-ah!" Her whole body trembled and shook as she came, sending a jet of her marecum spurting out from between them, streaking up along his body and spraying his face. He was already hard. But after that, it was like he was sporting a steel beam. Rainbow's legs went weak and she fell forward on top of him, panting into his ear and feeling his erection bobbing behind her flagged tail.
"You have no idea how badly I've wanted this," Rainbow whispered. "I've fantasized about this day, about you, for years. I didn't even know you were real. And now..." She wrapped her hooves around him and pressed her face into his mane. "It's like a dream come true!" She shimmied backwards, feeling the tip of his dick pressing against her marehood. "I can tell you want this too."
"I shouldn't- We shouldn't!"
"No doubt. I never claimed to be ordinary. But that's also not what I said," she added with a coy grin as she pushed herself back a bit harder against her tight entrance. "You know, for a long time, I thought I was a lesbian..." she said as she teased his tip. "There were just no stallions that I was attracted to. And I like mares well enough. But when I tried fooling around with mares, what I wanted more than anything was a dick. I guess it turns out that there was only one pony for me all along. I only just forgot. But now I have you back!" Rainbow pushed just a little harder, feeling his thick tip push inside her. "I choose an extraordinary life!" She moved back upright on her knees, only riding the first few inches of him.
"But you said it's not wrong if we don't put it in!"
"All the way in," Rainbow Dash corrected, biting the tip of her hoof with a blush. But whether consciously or subconsciously, her hips sank a little bit lower each time. It scratched that insatiable itch of her heat like no mare's hoof, tongue, or dildo ever could. She kept going until she felt his medial ring pop inside, finding it increasingly hard to convince him or herself how this wasn't wrong. Not that she especially cared. "Just as long as you don't... cum!"
She watched the expression on his face swing wildly from guilt to lust to worry and back again. He bit his lip, trying his best to focus on not cumming. But Rainbow knew what she was doing, and it had been far, far too long for both of them. There was no way he would last long.
He tried to slow her down. "M-Maybe I should go get a condom."
She threw all pretense to the wind and slid the rest of the way down, pressing her hips against his. She sat there and enjoyed the way he filled her perfectly. Just the right girth, and the perfect length for his tip to just barely kiss her cervix. "You're so deep inside me!" She shifted her hips against him a few times and he reached up with his hoof to try to lift her off, be she just grabbed them with her hooves and held them to her hips and she started riding up and down on him in earnest.
She watched his expression struggle a moment more as he tried to pull his hooves away from hers. But she could see the exact moment his last shred of willpower evaporated and his primal, animal brain took the wheel. His hooves, instead of trying to pull away, gripped her waist and hip hips started to actively buck upwards to meet her motions as he gave into his lust. It was enough to make her cum again, drenching his lap with her fresh juices. The room became a symphony of moans and the percussions of hips making wet slaps against each other.
Rainbow Dash looked down at her own, lithe figure. The girth of her brother's dick was making a visible bulge move up and down deep inside in her toned abdomen. His thrusts became more urgent and erratic, and his hooves gripping her tried to pull her off him once again. She grabbed his hooves and pinned them to the bed with all her weight, gripping his hips with her powerful thighs to lock herself on top of him. For a pony that had spent years in prison, it looked like he never bothered with the gym. It didn't help that being on the brink of climax practically paralyzed him.
Rainbow felt the bulge in her abdomen swell larger as the tip of his dick flared wide. His whole dick pulsed thicker and longer, pressing firmly against her cervix as he cried out. His shaft throbbed and pumped inside her, delivering rope after thick rope of pent up cum as deeply inside her as it could, flooding her womb. His potent pheromones absorbed into her uterine lining, signaling a mission very well accomplished, dousing the flames of her heat like no artificial potion possible could.
"It feels like you're nutting. But I trust you wouldn't do that." Rainbow Dash teased as she felt the burning of her estrus melting away.
"I'm sorry!" he cried.
"Wait! Did you really just cum inside me!?" Rainbow Dash asked with faux shock! "Did you just cum inside your sister!"
"I couldn't stop! I'm so sorry!"
"Oh my gosh! My fertile womb is flooded with my own brothers virile seed! I'm gonna get super incest pregnant!" she yelled, trying and failing to keep the grin from spreading across her face. Prism Blitz was filled with shock, shame, and an increasing amount of confusion. Rainbow Dash lunged forward on top of him to hug him tightly with his dick still firmly deep inside her. "THANK YOU!" She squealed.
"Wait- what!?" he asked.
"I'm gonna get maternity leave from the Wonderbolts, and then I'll retire early, and I can just stay home with you all day and we are gonna fuck, and fuck, and FUCK so much!" she said with wild excitement in her eyes. Somewhere in the back of his mind, Prism Blitz vaguely recalled another inmate mentioning something about not sticking your dick in crazy. "We are gonna have SO many foals together! Like, four hundred foals!"
"Four hundred!?"
"Yeah! Each one is a tax deduction, ya know. Plus, I'll have that sweet, sweet Wonderbolts pension! We'll be set for life!" Rainbow Dash rubbed the bulge of his dick inside her abdomen. "Hey, you'll still think I'm sexy when I have a big pregnant belly, right?" she asked. "Full of my brother's foals! Twins! Just like us! Since we're twins, it's more likely you know! Maybe even triplets! I'll have great big teats full of milk for you to suck, too! You know, Mom's been bitching about me settling down and getting married and having foals and this'll be sure to stick it right in her craw!"
"Wait- what are we gonna tell our parents!?"
"Fuck 'em!" Rainbow said. "I mean, don't actually. Unless you want to." She winked. "But seriously, I loved you, and they sent you to jail for a crime you didn't commit! Besides, they still think you're in Fillydelphia! They don't need to know who the father of my foals are. It's none of their business! I'll never sign that restraining order! I'll lawyer up and get all that shit against you dropped and your record expunged! One of the perks of being best friends with a princess!"
"But yeah- What about your friends? There's no way they're not gonna know I'm your brother. I mean look at me! I look just like you!"
"Psh!" Rainbow waved it off. "So they'll think I got knocked up from some rando from a one-night stand! And then my dear, sweet, super-helpful, soon-to-be-uncle, brother came to move in and help the poor single mother."
"Yeah, but... four hundred times?" he asked. "I don't think that's going to look very good for you. You know, there's a word for mares like that."
"Fuck 'em! I don't care if they think I'm a slut! The only pony that can make me feel ashamed is myself! And I don't feel ashamed at all!"
Prism Blitz looked down at where his sister's cream pie was still stuffed to the hilt with her brother's cock. "No, clearly not."
"Listen, we're gonna replace all those bad, guilty memories with Awesome™ ones!" She reached behind her tail and held her brother's balls in her hoof. "And I want to start by making sure we get every last drop of your pent up cum out of these! And we have a lot of lost time to make up for!" She wiggled her hips a bit. "Since you're still hard, you think you can go again? "
"I- I'm not sure-" He tried to answer but she was already going again. He was a little overstimulated, but not too much to hurt. Soon enough it melted away into pure pleasure. His hooves grabbed his sister's waist and he rolled her over onto her back. He had been getting fucked for long enough. It was time for him to finally take charge!
Rainbow Dash was only too happy to see her brother finally take the initiative, perhaps for the first time ever. "There's my brother! Fuck, I've missed you!" She grinned and grabbed her legs with her hooves to pull them back. His hooves grabbed her ankles and pushed them back into a breeding press as he fucked downward into her, gravity-assisted, deeper than ever. Rainbow Dash felt light-headed in euphoria as her brother rutted her. She moaned between panting, "So many foals... So! Many! Foals!"
