He's totally not MY brother, right?
It was the middle of the night when the young lavender alicorn mare crossed through the mirror into her human form. Altering the spell just right, she managed to land, not outside the school, now a college, but instead, crashing into the room of her counterpart. The mare now human met a painful crash onto the floor.
She never expected her alternate self to have a ceiling mirror over her bed. Twilight muttered off from the ground, her head spinning, body hurting. Her eyes scanned over the empty room, making sure no one heard her. Luckily, she had convinced Sunset to take this realm's Twilight away for a night of fun. Plus, she had timed this night so perfectly with Cadance's heavy grading schedule and Flurry Heart being babysitted by Pinkie Pie.
Altogether, she should be the only one inside the house. Her and the man she hungered for. Adjusting to her human body was always a pain. Especially since it had been a few years since the last time she was here. She pulled herself up from the ground, dusting off her clothing. Looking her body over, she smiled upon gauging the timeline just right.
The body of an eighteen-year-old. She had been planning this night for over a year now and needed to take all legal and ethical precautions. The night she would finally take her brother. No, it wasn't her brother, but her alternate's brother. There was nothing in the rule book against doing the dirty deed with him, right? He was totally not related to her.
She had been fantasizing about him since the first day she had spied on his handsome form through the mirrors. Every second of his showers and bathing, even while he banged his wife. Twilight loved every second of it, but her fantasies were a wicked and cruel thing. She always longed for her brother, but all the rules said incest was wrong.
So if she couldn't feel that horsecock pumping inside her, she would deal with the next best thing. A smile crossed as she leaped from her alternate's room and reached his bedroom door. It was already open, letting her in easily. She could hear him snoring deeply inside. His wife, child, and sister weren't home tonight, leaving them all alone.
She pushed the door open slowly, peaking inside. Her heart raced wildly as she saw his nude form sprawled across the bed. She could see his huge cock creaking up between his legs. How badly did she want to ride it. How many times did she watch him fucking his wife with it? Oh, how it would feel to have that monster stretching her insides, pumping her like a worthless whore.
She bit her lower lip as she crept closer to his sleeping form. He was on his back, spread out like a king. He was still sound asleep, a smile on his face as if he was expecting his wife to join him. Luckily for her that would not be happening tonight.
She crawled up onto the bed and measured up the length of his massive cock. Licking her lips, knowing how good this cock must be. She had been watching him for so long, the idea of it finally being inside her was beyond arousing. It was all she had thought about for a year, finally being able to feel that monster splitting her.
Rubbing it out was all the foreplay she cared to give. She didn't want to waste time sucking his cock. Flash had given her plenty of taste of human cock inside her mouth. What she wanted right now was to feel this cock deep inside her, stretching her, breaking her, turning her into a whimpering, slobbering mess.
Her hands rubbed up and down the length, feeling it throb and pulse into a full stride. It was a monstrous thing. One she was eager to have pounding inside her. Her hand gripped the base, holding it still as she dropped her clothing off her body.
Naked in a matter of seconds she climbed over and positioned the tip of the head against her pussy. It was a tight fit, the tip struggling to break past her lower lips. She could feel her arousal dripping down over the tip. The strong scent of her lust filled the room. Her brother's body shivered under her, a light groan escaping his mouth.
Twilight froze. Was he waking up? Was her time cut short? She didn't want to be caught yet. She was barely an inch of the head inside her. She didn't even have the chance to fuck him once before being discovered. That would be beyond mortifying. And yet her temptation was so strong. She couldn't wait.
She pressed her hands onto his stomach, pushed down to force his cock further inside her. A gasp left her mouth, followed by a long deep moan. The sensation was so much more powerful than anything she had imagined. It was beyond perfect. This was it, this was the cock she had wanted, the one she needed to quell her lust.
"So hot." She heard his voice, his tone weak and frail. Her eyes raced over his face, fearing his wake. "Cadance..."
She paused, watching his eyes move around, but remaining shut. His body shivered underneath her, his lips curling into a grit. He was dreaming about his wife. This was the best possible outcome. If he thought it was her, it would make this night a little easier.
Twilight smiled leaning down, pushing herself deeper and deeper onto his massive rod. She felt the length growing, stretching her insides, pushing further. She knew the human male size wasn't nearly as large as her kind, but her brother was a monster in any dimension. Something that made her even wetter.
"You're so tight," he whispered, his hips thrusting up, His arms fell around her, her breasts bunching into his face. His lips kissed and nuzzled her tits, his tongue licking over her hardening nipple. Her alternate's brother was an excellent lover. One that would satisfy her in every way.
She rode him slow and deep, feeling her brother's cock spreading her apart. Her mind raced as the sensation flooded through her body. It was better than anything she had imagined. Every fantasy she had was not nearly as satisfying as the reality of this cock deep inside her.
Her hips bucked, her ass clapping down onto his balls. His body was growing more and more hungry for her. Sitting up, one arm wrapped tight around her rear, finding her anus to finger, the other hand gripping her breasts, playing with them, teasing her nipples. His mouth found her neck and sucked down, sending shockwaves of pleasure and pain.
She cried out, her eyes rolling back. This was the best fuck of her life. The threesome she had with both Flashes didn't even come close to comparing. She could feel her orgasm rising up inside her. The burning hunger grew more and more intense. She had been waiting for this moment for so long and now it was all coming true.
"More... More..." She tried to fake Cadance's voice as best she could but it was difficult to concentrate with the cock pounding her pussy. She wanted this night to continue. The mare wanted to have her fill, but her body was betraying her. "Deeper... Shining!! I want your seed!!"
"Yes!" His hips were bucking up, his cock slamming up harder and deeper into her. "Take it, Cadance! Take all of it!!"
His thrusts grew more and more violent. Rolling her under him, he slammed her hard against the railing of his bed. It was so sudden, so rough, so painful. And yet she found herself screaming with desire. She couldn't help it. This was everything she had dreamed it would be. She was losing control, the burning passion, the lust, and the pleasure was beyond words.
Her fingers dug deep into his shoulders. She could feel his body tensing closer. Her toes curled, her eyes rolling back. It was impossible to resist. There was nothing that would stop her from enjoying this filling release. Her body was trembling to the edge. The climax was rushing to a point of no return.
"Cum... cum inside me." She begged. "Fill me!! Give me your seed!!"
"I love you, Cadance!" he cried out, his eyes popped open long enough to roll back.
Twilight gritted her teeth at the possibility of him seeing her in those tiny seconds. However, her brain didn't have a chance to think of an escape plan. His tip blasted hot seed deep into her pussy, the feeling causing her body to explode in a wave of euphoric bliss. She could feel the whiteness peppering her womb, filling her like she had always longed for.
The two shook back and forth, their bodies clinging to one another as the climax rolled over them. Her brother's seed filled her to the brim, his body falling limply against hers. He was panting hard, trying to catch his breath, his face resting on her tits. Her fingers combed through his hair, her heart still pounding.
"That was amazing," he whispered, his lips kissing her breasts. "Cadance--" He stopped cold upon seeing Twilight under him. His wokeness froze, his eyes wide.
She watched the confusion race over his face. The sudden realization that the woman he had fucked wasn't his wife. His face was red with anger, embarrassment, and frustration. All she could do was wave at him and say. "Okay, I know what this looks like but I'm totally not your sister!"
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