The full moon hung high in the sky, and the night was lovely. Big Mac had plenty of light as he walked home from Sugar Cube Corner. He just got back from an amazing date with Sugar Belle, his marefriend. But before it got too late, he had to return home, and check the trees before going to bed.

When he arrived at the front gate, he saw a strange yet familiar scene. There was a trail of blood leading to the barn. This was a troubling sign for sure. He could hear the screams of panic and agony coming from inside as he drew closer. His hands tensed and teeth gritted as he thought of all the horrible possibilities. Was it somepony he knew this time? One of his sisters? Applejack? Apple Bloom? Those were his most dreaded assumptions.

Big Mac burst into the barn and was immediately greeted with a sight he had grown way too accustomed to seeing. The blood trail led directly to the scene of the crime. The barely clad Standing over a fresh victim was the barely clothed Fluttershy, transformed into the primely busty and curvy Flutterbat.

Thunderlane, one of the best wonderbolts in the country, was her target. Rumble's older brother and best man of Applejack's wedding to his sister Coloratura. The stallion was a well-known and beloved friend of the family. But when he reached out to Big Mac for assistance, all he saw was the blank face staring back at him.

Big Mac moved to a pitchfork nearby. The creature seemed to notice the sound of the metal on the ground, as she lifted her head and glanced up at the large red stallion. Flutterbat hissed and growled at him. Big Mac lifted the pitchfork and aimed it at the batpony. When he saw that she would not give, he hurled it.

Yet, much to the shock of Thunderlane, it didn't go through her. Big Mac had pierced it through the poor stallion's chest instead, pinning him into the wall far from her. This killed him instantly. When Big Mac sighed and narrowed his eyes on Flutterbat crouching beneath Thunderlane's lifeless body, almost as though she was trying to hide from him.

Flutterbat's ears were drooped, letting out a small whimper. Her food was stolen from her so easily. And she knew that the only way she could get it back would be to steal it from another powerful stallion. Turning her attention towards Big Mac she licked her lips and charged right at him.

"Nope!" Big Mac roared and lunged ahead as well.

Flutterbat could not shift course or evade quickly enough. She was thrown against a wall by the larger and more powerful stallion before she even realized it. She gave a swift shake of her head and regained her bearings. However, she found the towering wall of muscle standing over her now, looking down with those emotionless eyes.

There were only two methods Big Mac knew of to free Fluttershy from this berserker state. His family had handled her issue in complete secrecy throughout the years. To be honest, Big Mac often felt very conflicted with the task at hand. Fluttershy was a friend and one of the sweetest mares in the land, after all. He may have even had a crush on her at one point. But when she got infected, everything changed.

Kind words... or heart-pounding discipline. And he was always a stallion of very few words. Unbuckling his pants and got ready to fulfill his responsibility of saving her insane mind. "Eeyup..."

The smack of his enormous cock prevented Flutterbat from escaping. With her mouth agape and horse meat from the Big Mac pinning her against the wall. Flutterbat attempted to scream, but his bulky length was slammed into her mouth, choking her. She attempted to turn her head back, but he restrained her by grabbing her mane.

Pushing her down until her back was against the hay, he started fucking her fangs slow and steady. The large red stallion didn't want to admit it but enjoyed every push into her mouth. He fought his desire to savor the pleasure. However, Flutterbat wasn't as respectful, moaning and squirming at the incredible power and thrill he gave her.

Flutterbat licked at the underside, soaking the whole thing in moisture. Her eyes rolled into the back of her head as the pleasure overwhelmed her. She wrapped her lips around his cock, and began to suck. Her urge to drink blood was being contained by a desire to drink his essence instead.

Even though Big Mac's breathing became labored, he maintained his poise. He kept thrusting his cock in and out of her mouth, forcing her tongue to lick and stroke it. His balls would swing and smash between her chin and rack with each push forward, making her moan louder each time. Her hand fell between her thighs as her legs splayed.

Flutterbat began fingering herself with utter lust and the absolute control he had over her fangs. Her wrist and hand were drenched with fluids. Her breasts jiggled and jumped, and her moans vibrated his cock. Big Mac's breathing increased stronger the more she whimpered and the tighter her lips got. To sate her cravings, he would have to offer her everything.

Big Mac jammed his cock as far down her throat as he could. With a grunt, he quickly and forcefully bucked his hips. The barn echoed with the sound of violent slapping and sucking. Her claws had become disoriented, with one digging into her pussy and the other twisting his sack. Her wings flared and her body spasmed.

Big Mac was no longer able to contain it. A long, thick load of hot sperm shot right down her stomach. She gagged and coughed from the heat as it combined with the blood she had already drunk from Thunderlane. Flutterbat did her hardest to suck down his spicy jizz, but it was always too much.

Flutterbat collapsed onto the ground, her pussy overflowing with her fluids and her stomach bubbled with cum. She turned over, spat, and then threw up, spitting out extra sperm. He knew not to give her time to recover. She was a dangerous creature.

Grabbing her by the tail, he yanked her hips upward. Her face and breasts were on the ground, and her ass was lifted into the air. His cock was hard again as he grabbed it and slammed it into her pussy. Flutterbat's eyes widened as she was taken by surprise. She had no time to heed as Big Mac pounded her hard and drove his cock deep into her.

With each strong thrust, her breasts crushed and rippled against the hay as she shouted with lust. Her clit was being viciously pounded as her pussy stretched. Flutterbat bit her lower lip and drew a tiny bit of blood. The blood dripped from her fangs and onto her breasts.

Leaning forward, Big Mac jerked her up by her hair. Gazing directly into her eyes, he rested her head back on his chest. "You're not a bad pony," he stated in the most subdued yet authoritative manner. "You're a good pony. A sweet, kind, and gentle pony. I love you, Fluttershy. And I know you don't want to hurt anypony."

Her eyes began to water as his words hit her in the heart. Leaning back, she kissed him. Their tongues interacted in a dance. His arms encircled her large rack, kneading and pinching her nipples. Her pussy contracted and her body trembled with joy.

Flutterbat's legs trembled, body shivering. Big Mac broke through all of her barricades and subdued her bloodlust with fierce and brutal fucks. She closed her eyes and deepened the kiss. He was unrelenting and merciless in his beating. She relished every moment of it.

His hand eventually fell to her hips. The noises of skin slapping intensified. Big Mac took a deeper breath and pressed in even more. The two lovers panted like ferocious animals when their kiss broke. Flutterbat retaliated with all of her desires, clapping her hips back into his.

His cock gave her a last violent smack, releasing a powerful and potent load within her. Her body trembled with the pleasure, and she reached her climax, coating his sack with her sperm and splattering her secretions all over the floor. Her heart was pounding and her head was a blur. Huge Mac embraced her and allowed his seed to overflow her womb.

After their orgasms subsided, Big Mac carefully released her. His jizz spilled on the ground as he drew his cock out. Standing, he peered down at her. She was a panting, sweating mess, but returning to normal. The feathers on her wings returned, and her incredible curves were reduced to her meager and timid shape.

While Big Mac didn't mind her busty transformation, this form was a greater preference to him. She had a modest, cute body and a matching personality. Being a true gentle stallion, he took off his jacket and dropped it over her naked and shivering form. He lifted her with his powerful muscles, lulling her to sleep, and carried the mare out of the barn.

"Big Mac?!" He was stopped in his tracks by a voice. He turned slowly and was shocked to see Sugar Belle, his marefriend, standing by the door. "What the heck is going on here?"

"Sugar... Not what you think?" Unable to explain away the scene, he winced.

"I came by to kiss you goodnight... only to find you fornicating with this monster--" Her words were cut off by a booming sound.

Big Mac's eyes opened and widened in horror as she dropped to the ground. Applejack, who appeared as icy as steel and was clutching a shotgun, stood behind her. However, Big Mac could see the regret deep in her eyes and she walked into the barn.

She discovered Thunderlane off the wall, gradually changing. He tore out the pitchfork as he crawled to his knees. The stallion squirmed in confusion realizing he had not lost any blood. Seconds later all that changed as his body twisted in agony. Muscles pulsed and bones snapped out loud. His fur was becoming paler and his feathers were dropping out.

"Shh," Applejack pumped the shotgun. "It's okay, sugarcube," She shoved the barrel right into his mouth just as his fangs curved. "We're gonna fix this." There was a loud blast and light flashed into the barn. The contents of Thunderlane's brain flew all over the place. After observing the body tremble a few times, Applejack fired additional rounds, tearing away the limbs. Ensuring that the undead beast would not rise again, she fired two more blasts into the heart.

When the apple mare went outside, she was a little taken aback to see that Sugar Cude was still moving—though not very much. With a heavy sigh, she fired her last bullet right through her skull. It was better than leaving her to suffer. Then, her gaze shifted to Big Mac, the tears flowing down his cheeks.

She stopped in front of him and spoke softest. "Damn it, you know this has to remain a secret. You can't go around lettin' everypony know what Fluttershy becomes when the moon is full." She stroked the mane of Fluttershy.

"Eeyup..." Unable to look away from his marefriend's motionless form, he nodded in agreement.

"Now get in the house," she commanded. "I'll handle burying Thunderlane and Sugar Belle with the other corpses. If'n yer lucky, we'll have a small service tomorrow and then we can forget about all this."

The sorrow and loss wanted to knock him down, but he gripped his hands tightly around Fluttershy. He maintained his composure, turned his back, and headed into the farmhouse. Applejack, his sister, watched him go. There was nothing for her to do. They could not let the world know about Fluttershy's curse. They made a vow to protect the secret at all costs.

******

Author's Note

My headcanon is not that Thunderlane and Coloratura are related, but rather I needed to add more to Applejack's action. Plus, I continue my gag of torturing/killing Thunderlane.

Calm down, I have something fun planned for him in April. For now, he'll be making another painful appearance in the final one shot for this month.