Applejack sighed as walked through the orchard. This was her first heat, and her hormones demanded that she have a foal. She needed release. She began to day dream. What would it actually be like to have a foal? She played with this thought for a few minutes. She imagined herself growing big with life. She smiled happily. That would be great someday.
Why wait?
She blinked at that thought. She shook her head. No. It was too early. Right? The more she thought about it, however, the more impatient she became. She...she wanted one. She wanted one right now, consequences be dammed. Today. She wanted to have one in her today. She...she wanted to be bred.
Trouble was, she didn't know any stallion that well. Except her brother. She blushed but shook her head. No. That was incest. And incest was wrong.
Nopony has to know it's his. There was that voice again.
Applejack bit her lip. This wasn't right. She was his little sister.
Who wants to be bred by her big brother.
She tried to push out the dirty thoughts out of her head, but she couldn't stop thinking how good it would feel. How warm his sperm would be. Applejack felt fluids drip down her leg. Maybe...Maybe if they never told somepony. She would tell them she met a stallion. A one-time fling. They forgot to use protection.
She saw Big Mac enter the barn. Now was her chance. She all but galloped to the barn.
Applejack closed the barn door behind her. Big Mac's ears twitched and turned around, "Hey, sis. Whut's up?"
Applejack stared at him. She took a few steps forward, "Ah love ya, Big Mac."
Big Mac dropped the basket harness, "Ah, uh, love ya too, sis."
Applejack shook her head and stepped closer, "Ah really love ya."
Big Mac stared at his blushing sister, "Whut do ya mean by that?"
"A-Ah was thinkin', that maybe th' Apple family needs 'nother member it it," Applejack moved even closer.
"...whut are ya gettin' at, AJ?"
Applejack continued to step towards Big Mac, who was getting nervous, "Ah wanna foal, Big Mac. An' Ah want it ta be yers."
Big Mac reared back in shock, "WHAT?! Are ya insane?!"
"No, Ah'm not," Before he could react, Applejack closed the distance and put her lips to his. Big Mac was so shocked that he opened his mouth, allowing her tongue to go into his. Big Mac stood stock still as Applejack made out with her brother. She eventually broke the kiss, staring lovingly into his wide eyes, "Ah love ya so much."
Big Mac took a step back, "Whut th' hay, Applejack-"
Applejack pushed her backside up against Big Mac's face. His eyes widened, breathing in her scent. He felt his dick twitch. No, this was wrong. She was his sister. He tried to ignore the instinctual voice in his head telling him to breed the mare before him, but Applejack's scent was driving the sexual part of his brain wild.
"C'mon, Big Mac. Ah know ya love meh and mah scent. Why fight yer urges? Nopony hasta know."
Big Mac groaned as he felt his shaft harden and extend. He pushed himself back, "Th-this is wrong, AJ! Ah'm yer..."
Big Mac's eyes widened as he saw Applejack wink at him repeatedly. She stared back at him with half lidded eyes, "Ah know yer mah big brother. An' Ah want mah big brother ta make meh feel good," She winked at him again, lowering her gaze down below Big Mac's legs, "An' Ah know yer exited. Rut meh."
"Ah-Ah..." Big Mac stammered while Applejack walked to his side. He let out a gasp as he felt her touch him.
"Mmm~. Yer really big." Big Mac shuddered as his sister rubbed a hoof down his shaft. He grunted when she reached his balls, "So are these. So full wit' foals," she said while caressing his shaft and balls. She breathed in his scent and bit her lip. She needed him badly. She stroked his cock up and down, massaging his big testicles all the while.
Pre-cum started to drip from his tip from all the teasing. Applejack positioned herself under it and allowed the pre-cum drip into her mouth. She moaned. Big Mac's eyes grew huge when he felt his sister lap his tip. He wanted to pull away, but found out he couldn't when he felt her mouth envelop the tip of his cock.
She positioned herself so that her flanks was under his chin as Applejack started to bob her head up and down. Big Mac didn't move, moaning as he felt her wet mouth take more of his cock in it. Just...just a blowjob. That's it. Applejack slurped and sucked on his length, lewd sounds filling the air. They only made Big Mac and his sister hornier. Her throat bulged outward.
Big Mac started to thrust his hips forward, more of his length being eagerly swallowed. Big Mac panted, huffing through his nose as Applejack managed to start to deepthroat him, "H-how did you get this good?" he panted.
Applejack just moaned as she reached up to caress Big Mac's testicles with her hoof. She managed to reach his medial ring, tonguing the underside of his cock. Big Mag groaned, getting close. Saliva dripped down her chin as she moved faster and faster, feeling his shaft twitched and shudder. That's it, let it all out. She wrapped a hoof around his shaft and rapidly moved it back and forth.
Big Mac yelled as he came. His hips bucked repeatedly at Applejack as he sprayed his load down into her stomach. She didn't let a single drop get out. She slowly pulled back, sucking all the while. Applejack took out the cock in her mouth and went out from under him. Big Mac closed his eyes, slowly coming down from his high.
When he opened his eyes he saw Applejack presenting herself at him. He shakily shook his head, "N-no, th-that was enough."
Applejack grinned and winked at him, "Was it really? You an' Ah both know ya want ta feel mah insides. Fuck yer lil' sister. Ah know ya want ta."
She seductively waved her flanks at her brother, who shifted in place. He could smell her from here, and felt his dick starting to harden again. He shakily took a step toward her, the scent increasing.
Applejack spoke, making her voice as husky as possible, "Breed yer lil' sister~."
That did it, and Big Mac found he could no longer control his instincts. He all but galloped to her, who pressed her face down and ass up. Applejack panted as he grabbed her flanks and lined himself up, "C'mon, Big Mac! Rut yer little sister! Shove it in!"
Big Mac complied and they both moaned as his big cock started to sink into her depths, "Y-yer so big~."
"Yer really tight," he replied, the wrongness of incest the furthest from him mind. He pushed further inwards until Applejack felt his balls resting against her winking clit. He slowly moved back, causing his little sister to moan and shudder as she felt his cock rub against her clitoris.
Big Mac was in heaven as he pushed back in. His sister was so warm. So wet. So tight. Applejack pushed back at him, "G-go faster! Rut meh!"
Her big brother complied and picked up a speedy pace. Applejack moaned in bliss as she felt his foal-filled balls slap against her clit. She pushed back with his thrusts, wanting the stiff rod deeper inside her. Wet squelches filled the air, complemented by slaps. This was all accented by moans and groans.
Big Mac's tongue rolled out, starting to go even faster. Applejack was drooling, sent rocking forward with each thrust. Her walls hugged him with all their worth. This wasn't loving sex. It was rutting, a stallion simply breeding a mare. Applejack's eyes rolled back and she screamed as an orgasm came over her.
Big Mac was pounding his little sister for all her worth. His sister. He moaned at the thought of breeding his own kin. It was so taboo and he loved every minute of it. Why had he hesitated? Big Mac felt Applejack clench down on him hard, but forced himself not to cum. Not yet. He wanted to enjoy rutting his own sister a little while longer. Then he would cum Then he would breed her womb. Then he would make a foal in his own sister.
Applejack recovered, "B-breed meh, Big Mac! Make yer little sister pregnant. Ah wanna have yer foals! F-fill me up!"
He bit down on the nape of his sister's neck. This showed Applejack who was in charge now. His testicles smacked against her sensitive clit over and over, bringing her closer to another orgasm. His large cock hit her cervix again and again. Any moment now and Big Mack would cum in her little sister's pussy.
He thrusted faster, panting heavily. Applejack looked up at him lustfully, "Y-yer gonna cum in yer little sister? Ya gonna get her pregnant? Mmm~, Ah bet you are. Ya want to badly, don't you? Ya always have. Ya imagined this moment fer a while, haven't ya? Ah bet ya touched yerself while thinking of meh. Go one. C-cum in yer sister! Fill yer sister wit' yer foals!"
Big Mac screamed as he thrust himself as deeply into his waiting sister as he could. He spewed into her womb directly, filling it with his fertile seed. Applejack's eyes rolled back again as her tongue lolled out, cumming. She did it. She made her big brother cum inside her, giving her a foal. She loved the warm feeling. The cum started to go backwards, spilling out of her pussy and onto the ground. A pool started to form.
Big Mac eventually stopped cumming. He gasped and panted as he recovered. Again. He wanted to do it again. He wanted to make sure he gave her a foal. He wanted to breed his little sister again. He started to thrust again.
Applejack's eyes went huge in delight, "W-woah nelly!"
Big Mac's eyes were unfocused as he fucked his sister hard. It felt so good. His sister's pussy felt so good. Applejack squealed and moaned after a hard thrust. All the cum aided in the lubrication. Big Mac groaned, "Ya feel so good lil' sis. Ah can't stop."
"Th-then don't! Gimme a healthy foal!"
Applejack's flanks started to become red with how hard her big brother fucked her. She loved it. Her walls were stretched so tightly around the cock. Her brother's cock. His thrusts eventually made his dick push through her cervix. She came again. This time he came with her. He moaned loudly, filling her sister with more seed. More sperm. Her stomach started to grow. When he stopped cumming she looked pregnant. Like how she wanted.
Big Mac still felt horny. He pulled back and shoved back in, gaining a rhythm. Applejack was in heaven, eyes rolled back and tongue out. The balls, still sloshing with cum, hit her backside repeatedly. Applejack reached down and stroked her large belly, moaning. Her brother's cum sloshed in her womb, belly swaying.
"C-cum in meh again, Big Mac!" She loved the feeling of being so full.
Big Mac grunted, enjoying how tight her cervix was. No cum escaped. He felt his cock head push through the sea of cum. Applejack had her cheek on the ground, tongue lolling out, "Mmm, ahh, ugghh."
Grunting, he plowed into his little sister. He looked down, seeing her big belly wiggle and slosh. He continued to fuck his own sister for a few minutes before starting to thrust hard. Wet slaps filled the air. The slosh of cum was audible. Big Mac grunted as he fucked his little sister nice and hard, "Uhhn, uhhn, uhhn."
Applejack came again but Big Mac just kept going. His little sister's tight walls clamped down on him but he just powered through. They were both reduced to animalistic grunts. Breed. That was the only thing on both of their minds. Breed and make a foal.
Big Mac hilted himself one last time and came into the already full womb. Applejack's belly grew and grew until it reached the floor. His orgasm petered out and left them both panting for breath. Big Mac pulled out and a stream of cum flowed out of Applejack's marehood. Applejack collapsed on her big belly, her body weight helping push the cum out. She eventually deflated enough to lie flat on her stomach. She got up on shaking legs and moved the sitting Big Mac.
Applejack nuzzled her big brother, "Ah love ya, Big Mac."
Big Mac stared blankly forward before speaking, "I love ya too, AJ...W-whut should we call it?"
"Ifin it's a filly, Ah'd like it ta be Applebloom."