Shining Armor trotted his way throw the corridors of the castle of Canterlot. He had a serious expression and wore his full armor and was in a hurry to arrive at his destination. Just a few minutes ago he received a letter from Princess Luna saying that his wife, Princess Cadence had an accident. He feared for his loved wife and the letter didn't had many details of what happen, what made the stallion more worried than anything.
He arrived on the room he shared with Princess Cadence and opened the door, bursting inside.
“Cadence!” He called his wife, but she was not there. He saw only Princess Luna and Twilight looking at him with serious expressions. “Princess Luna? Twilight? Where is my wife? Is she ok?” He asked to the two mares in front of him getting closer.
“Oh yes... she is fine, don't worry brother...” Twilight said getting closer to him.
“It's you that won't be fine when we finish!” Luna said and her horn started to shine. Last thing that Shining Armor saw was a dark blue flash and then he was thrown in the darkness.
It was impossible to know how much time Shining Armor slept... Slowly he started to awake. At first his vision was all blurred. All he could see was the place had a bad illumination... He tried to stand up but soon discovered that his front legs were bound together and his hind legs had a metal bar between, making them spread.
He closed his eyes shut and breathes deeply, trying to keep calm. He opened his eyes again and was able to see his surroundings. He was in a dungeon cell all made of stone. Few torches were attached to the walls. He tried to use his magic but he couldn't feel his horn working. He tried again but something was blocking it. There was a silver ring on his horn, preventing him to use any kind of magic.
When he rolled on the floor to position himself better, with his back on the floor now... He was confused, what had just happen? He received a letter from Princess Luna about his wife, but when he arrived there Luna attacked him. Why would she do something like that?
His thoughts were interrupted when he heard hoofsteps getting closer. The cell's door opened and he turned his head to see better his visitors. It was Princess Luna and Twilight. Both had a sinister grin on their faces as they stared at the impotent stallion on the ground.
“T-Twilight! Luna! Please, release me... why you two did that?” He asked in confusion.
“Oh, my dear brother... my dear BBBFF...” Twilight said stepping closer to him and caressing his face with a hoof. “Do you really know how to play dumb don't you?” She said and smacked the hoof against his face. He closed his eyes when her hoof hit him. It only stung a little, since she didn't had that much strength... or held it back to deliver the blow. He opened his eyes as he felt her snout rubbing against the spot she had hit.
“Twilight... what... what's going on?” he said with his voice a little shaken.
“You really don't know? Or are you only playing dumb? Either way...” She said and kissed him lightly on the lips... he blushed really hard with that. “...I'll tell you what's going on... Me and Luna were practicing some spells to recover lost memories so I could remember better what I learn... and guess what memory was brought back?” She said smiling at him.
Shining Armor's eyes widened at her phrase.
“Yes... I can see YOU remember it dear brother... and I wonder what would happen if the fact that you had some... fun... with me when we were little, reached Cadence's ears...”
“NO!” Shining Armor said pleading. “Please.... it would ruin our marriage!” He said with widen open eyes, really in panic. “We were just foals back then Twi... Please, it was a foolish mistake I made... You have to believe me! I regretted it afterward”
Luna was still staring at the stallion with a serious expression. Twilight simply laughed softly.
“Oh... I don't know anything about that time brother... but I know that I'll have my revenge on you. Oh yes I'll... and THEN you will regret it” She let out an evil laugh.
Luna's Horn started to glow and both, Twilight and Shining Armor were warped on that dark blue aura for a second. When the aura lifted from them Shining Armor saw himself transformed in a filly, same size as Twilight. He got a curve body and his mane was longer... also he could feel something wrong on his most intimate parts. Twilight was bigger now. Her body was more buffed and her mane was shorter... She was a fine stallion now and with a fine 'equipment' that caught Shining Armor's attention. From his angle he could see perfectly between his former little sister's legs.
“T-Twilight!” Shining armor said and widened his eyes as he heard his own voice... it was a filly's voice.
“What do you think about your new body my 'little sister'?” Twilight said with a male voice, smirking at Shining armor.
The purple unicorn used his magic to turn Shining Armor belly up and held him on the stone floor. She then stepped forward and lowered her hips, just enough so the white unicorn could reach her new male parts.
“Sister please... I said I was sorry!” Shining Armor plead, staring at the genitalia that was few inches from her snout.
“Do it... or I swear I'll show your wife the memory of that day you took my virginity and then tell her how you used your magic to twist my memories, making me believe it was a diffuse nightmare!” Twilight said with his new male voice, threatening her brother, now transformed into a filly.
Shining armor hesitated for a second... and then closed his eyes, moving his head forward and nuzzling Twilight's genitalia... The purple unicorn felt a soft shiver as Shining Armor's snout touched his male parts. Twilight could feel how easy was to get aroused when you are a male. Her shaft started to grow, going outside her sheath. A long meat stick was now hanging between Twilight's legs.
The former stallion grabbed the tip of the shaft with his mouth and moved his head forward, sucking it with a bit of disgust. He was a stallion after all, at least he used to be one, and the idea of sucking another male was repugnant. Even if the male was his former little sister.
Twilight was loving to feel that warm and soft mouth around her length. More blood rushed the that piece of meat, making it hard as a rock. Waves of pleasure truck her brain as her former brother moved his head up and down. When she felt his tongue rubbing her sensitive shaft, a spasm made her hips move forward, pushing it all the way in.
Shining armor gagged ad squirm as the shaft forced its way to his throat, blocking the passage of air. His nose was pressing against Twilight's balls. He tried to move his head back but was unable to move at all. Twilight's moved her hips backwards, pulling all her shaft from her former brother's throat and letting him breathe again. He breathed deeply with his nose, panting lightly...
Twilight let Shining Armor breath a little and then pushed her shaft forward in his throat again and started to move back and forward, thrusting her male stick on the white unicorn mouth and throat. Shining armor could do nothing but squirm and moan in despair as he felt her own sister raping his mouth...
The purple unicorn felt strong waves of pleasure with each thrust. She started to go faster and faster, moaning and grunting from the strong pleasure. Without any kind of experience in being a male, she didn't last long and with a last thrust, Twilight hit a climax. Thick spurts of semen were poured on Shining Armor's throat. Twilight quickly pulled her shaft out, still cuming in large quantity inside her brother's mouth before pulling it all out and letting a last spurt of semen hit right in his face.
The white unicorn coughs hard, gasping for air, and spat all the semen that was on his mouth.
“W-why... why are you doing this? D-din't I said... T-That I was sorry?” Shining armor said shedding some tears. He never thought that he would cry like that, but being raped by his own sister was too painful for him to bear.
“Do you think that mere words can compensate for a lost virginity, dear brother?” Twilight said panting a little after her orgasm. “Do you have any idea how I felt after recovering that memory? How betrayed I felt... how that hurt?” She shouted the last part in her male voice. “You will taste all that I have felt, and this was just an extra because you made me forget so you wouldn't have to bear the responsibilities!”
Shining armor looked away from her sister... He knew he was guilty, he knew he deserved to be punished... but it was twice as painful having to suffer in his sister's hooves like that. All the shame he felt, not to mention his broken male pride.
The white unicorn shivered when he felt his sister’s tongue on his new female genitalia. Twilight passed her tongue along his brother's slit, knowing each part that should be stimulated. It didn't take long before Shining armor was whimpering softly from arousal. His female genitalia was getting wetter… more and more.
Twilight stepped back and her magic engulfed he brother, making him float for a second, turning him with belly down. She landed him in the floor and now his front body was in the floor, since he couldn't use his forehoofs to stand up. But his hips were high in the air with his back legs all spread. Twilight's horn glow again and her magic engulfed her male genitalia. She moaned softly as his malehood started to grow and get hard again.
Shining Armor was shivering a little. His mind was in a colossal conflict between reason and instinct. Twilight had made a good work on arousing him and his female genitalia was soaked wet. Twilight walked slowly behind her brother and then lifted her front body, mounting him.
“Twilight, please don't do it... I'm begging you... don't do it!” Shining Armor plead again
“Ohh... Sorry big bro... but you've been a 'bad girl'... and 'bad girls' deserve to be punished!” She said and with a single thrust she shoved all her male meat inside the white unicorn. Her shaft easily broke Shining Armor hymen and was now buried really deep in him.
The white unicorn let out a scream of pain as he felt her sister tearing his insides like that. And yelped when Twilight pushed it further, pressing her body against his.
“D-Damn brother... you are really tight you know that?” Twilight said and her words struck the white unicorn like a spike in what was left of his pride. “Probably I was like that right? RIGHT!?” She said and pulling her shaft outside and the shoving it brutally inside again, making Shining Armor cry in pain.
His insides were having strong spasms, trying to push the intruder shaft outside, but that was only making Twilight hornier. Without waste any more time, the purple unicorn started to rock her hips back and forward, thrusting her length inside her brother's female genitalia without mercy.
“Stop! Twilight! Please stop it! It hurts!” Shining armor cried as he was feeling that big shaft moving fast inside him. It wasn't really hurting... he was feeling great waves of pleasure with that... what was hurting like an open wound was his pride. How could the captain of the guard enjoy this kind of filthy act? How could he be enjoying the feeling of her sister inside him?
Twilight started to go faster, her tongue lolling out of her mouth as she panted hard with each thrust. Shining Armor’s cries converted to moans of pleasure. He couldn’t believe it. He could feel his climax approaching. He fought back as much as he could but the feeling of that big shaft going in and out of him was maddening. Twilight shoved all her malehood in the white unicorn’s insides and came again, filling his womb with hot and thick spurts of semen. Shining Armor lost control over his body when the first spurt came. He squeezed the shaft inside him in a strong spasm when he came too.
Shining armor collapsed on the stone floor, breathing hard and looking at his sister over his shoulders. He shivered as he saw her smirking at him.
“Don’t think this is over dear brother… the spell will last for almost 24 hours… and I’ll enjoy every single minute of it with you!” Twilight said and chuckled. Shining Armor whimpered, knowing that he was doomed now… and it would be the longest day on his life….
A/N: I just made this for fun but comments are still appreciated ^^
Hope you perverts have enjoyed it! /)