The succulent sounds of sex serenaded the summer sunset. Rainbow Dash, flying at a low altitude, quickly turned her head in the direction of the noise which seemed to be coming from Sweet Apple Acres. But the noises stopped abruptly before she completely registered what they were. Curious and without anywhere else to be, Rainbow gently glided to rest in a tree nearby the Apple's barn.
"Don't go so fast, Big Mac, Apple Bloom could come get us for dinner at any moment."
"Eeyup."
Oh ho ho, Rainbow Dash thought, this is good. Risking getting caught, she crawled out further onto the branch and was able to see Applejack under Big Mac's large frame, her freckled face flushed and a small puddle growing underneath her twitching hind legs. Rainbow Dash stopped and squatted low on the branch, barely moving while she looked down at the siblings.
Luckily, Applejack had her eyes screwed shut as Big Mac slowly started moving himself out and back into her again and Big Mac's head was held high enough that the barn wall above the door blocked Rainbow Dash from his vision. Even while holding back and moving slower the sound of their sex was still plenty loud enough for Rainbow Dash to hear how wet Applejack was with every thrust.
Realizing that her wings were far too stiff to fly away, Rainbow Dash struggled to stay balanced on the tree branch as her wings rose up. With nothing else to do Rainbow laid down on the branch and hugged it with all four of her still working limbs.
"Oh yes, Daddy!" Applejack whispered to Big Mac. "Do ya like your little girl's tight pussy?"
"Eeyup," Big Mac panted. "Don't tell your mother about this now."
Oh, this is kinky. Rainbow's breath hitched in her throat as she started to get wet from seeing her friend role-playing. She never would have imagined someone like Applejack of all ponies would be into incest like this. And the rough bark grinding against her vagina was starting to get her even more aroused than she already was.
"Don't ya worry none about that, Daddy. I'll always be your little girl to cum in."
Rainbow Dash couldn't hold back anymore and started grinding her pussy against the branch, her juices quickly coating the length of wood she was using, making the discomfort of the rough bark only a passing annoyance.
She bit into her foreleg so she wouldn't squeak while grinding the branch, her pegasus sex drive kicking in and with the show being given to her she was already building to a quick climax.
Big Mac wrapped a hoof around Applejack's ponytail and pulled her head back as he pushed deep inside her before cumming inside of Applejack's pussy. Applejack gasped and opened her eyes, making eye contact with Rainbow Dash before cumming from the sensation of Big Mac's hot load leaking out around his softening erection. Rainbow Dash barely registered this as she came herself, maintaining eye contact with Applejack as she squirted and went limp against the branch.
Applejack quickly recovered from the shock of seeing Rainbow watching her have incestuous sex with her brother. "Well, well, well. Looks like we got ourselves caught Big Mac," Applejack said before she rolled onto her back. "Why don't you come down here, Rainbow?"
"Oh my gosh, Applejack, I heard a noise and didn't know what it was so I figured I'd come take a look and then by the time I found out what it was my wings locked up because it was hot and I couldn't get down from the tree and you were just… so hot! I couldn't help but masturbate." Rainbow Dash said in a near single stream of words as she glided down on her now thankfully working wings.
"It's alright Dash."
"But it's not like I went out of my way to find out, I just heard something and was curious and couldn't move once I was here, and didn't want to interrupt you. Did I mention that that was hot?"
"Rainbow…"
"Like really freaking hot. I mean that's your brother."
"Dash!" Applejack shouted. "I said that it was alright. Didn't I?"
"I'm so sorry Applejack, just let me calm down so my wings can fly again and I'll be out of your hair, your secret's safe with me."
"Well now. You're just going to interrupt us and fly off? If you found it so hot wouldn't you like to join in?" Applejack said with a smirk, watching as Rainbow Dash's wings starting getting stiff again.
"J-join in?" Rainbow Dash could hardly believe her ears. Her best friend was inviting her to fuck both her and her brother.
Applejack reached down and spread her cum covered vagina. "Now, I might need to be cleaned up a little bit, if'n ya don't mind."
Rainbow Dash gulped hard. Looking at Applejack's glistening cream pie. This had to be a dream, right?
"It's not nice to keep a mare waiting, ya know?" Applejack said shortly.
Rainbow Dash wasted no time in walking over and laying down in front of Applejack's spread legs. Now close enough for the musky scent of Applejack and Big Mac's combined fluids and the raw heat emanating from Applejack's pussy to hit her face.
Out of the corner of her eye Rainbow Dash saw Big Mac's penis, already back at half mast just from seeing his sister about to get his cream pie eaten out of her.
Rainbow Dash could feel herself flushing, knowing that she was probably just playing a role in some weird fetish between the Apple siblings, but couldn't help but feel even more aroused at the thought.
Rainbow slowly pushed her tongue out and began licking up Big Mac's cum from Applejack's pussy. The strong musky flavor filling her mouth as she lapped up every dribble she could see. Applejack panting softly every time Rainbow's tongue returned to her flesh.
Big Mac's load was bigger than Rainbow Dash thought it would be and it took quite a bit of time to clean up all of it. Finally having Applejack cleaned off Rainbow pressed her tongue against Applejack's clit.
Applejack moaned loudly and even more of Big Mac's cum squeezed itself out of her hole. Rainbow Dash leaned back a little bit to see this and wiggled her tongue inside Applejack's hole to get the last remaining cum.
"Oh fuck Dash." Applejack whispered. "Ya dirty girl, drink up my Daddy's milk." Rainbow Dash felt Applejack's slick walls squeeze against her tongue as a final wave of cum gushed into her mouth.
Rainbow Dash gulped the mouthful of cum quickly, she could feel the amount of cum she drank resting in her stomach. Pulling her tongue out of Applejack's pussy she trailed a string of fluid off her tongue as she once again started licking at Applejack's clit.
Feeling Applejack tense up Rainbow Dash knew that she was getting close and backed off opting to instead kiss the fur around her nethers that had gotten matted from all the juices of their activities.
Rainbow Dash snaked a hoof down to her own folds and began to knead her clit. It didn't take long at all for her juices to leak around her hoof and she could feel herself getting close herself.
Rainbow sucked on Applejack's clit, and could feel Applejack reflexively buck her hips into her muzzle. Alternating between pulling her clit into her mouth and licking at it Rainbow could feel Applejack's body working up to a climax.
"Dash, I'm cumming," Applejack called out before twitching and Rainbow felt a hot wetness hit her chin that caused her to cum against her hoof. "That there was some mighty fine tongue work Dash. Come on up here and let me taste it."
Rainbow Dash complied and crawled up Applejack's body until they were face to face. Her pussy dragged against Applejack's strong hind leg on the way up. Applejack licked up her own juices from Rainbow's chin before drawing her in for a kiss. Rainbow Dash melted at the affection and when Applejack's tongue pressed against her lips requesting entry Rainbow Dash could only open her mouth to let Applejack's tongue explore her.
Big Mac cleared his throat causing their kiss to break apart, a thin strand of mixed fluids still connecting their mouths. "Y'all seem to have forgotten about me," He said, his cock now fully erect and a small dribble of precum oozing from his twitching length.
Rainbow Dash had never seen a stallion as large as him before, but knew that her pussy could take it. "B-Big Mac… could you rut me this time?" Rainbow Dash murmured, wiggling her hips towards him. "If that's alright, it's just I've never seen a cock that big before and want to feel it inside me."
"Didn't take ya long to warm up to us did it, Dashie?" Applejack said with a smirk before nibbling on Rainbow's ear. "Come on Daddy, fuck my friend on top of me."
Big Mac walked over and Rainbow Dash panted in anticipation for his cock to enter her.
Big Mac wrapped her tail around his foreleg and pulled it up and out of the way. Rainbow Dash squeaked from the force put on her dock and raised her butt further into the air. She could feel Big Mac's head press against her entrance and thanks to her already cumming twice his cock slid inside of her without any resistance.
Rainbow Dash bit into Applejack's neck from the pleasure of having her pussy spread wider than she had ever gone before. She was certain that if he were any bigger this would hurt, but instead it was just perfect. She squeezed her walls tighter around his length and every inch that plunged into her sent her to new heights.
Applejack moaned from her bite before pushing her head away and leaning up to bite Rainbow back. She bit hard and sucked at her skin to leave a small mark before drawing back and licking where she bit.
Rainbow Dash could feel Big Mac pumping his cock in and out of her, his hips smacking her rump making the very same noises that drew her here in the first place. Between the slight pain on her neck from where Applejack had bit her and the stretching of her pussy Rainbow Dash couldn't hold on anymore and came for a third time.
The hot rush of Rainbow's cum around Big Mac's cock made her love tunnel even slicker than it was before and Rainbow Dash collapsed against Applejack as all strength from her legs gave way. Her body melted as Big Mac continued to pound himself into her for just a little longer before she felt him press himself deep inside her and a second later his cock twitched and a torrent of cum filled her. She could feel the cum squeeze past Big Mac's penis and leak out of her before dripping down onto Applejack's crotch.
Big Mac collapsed on top of her and Rainbow Dash felt herself be squished between Applejack and Big Mac's strong frames. Rainbow Dash felt safe and secure between them and the rising and falling of their breathing pressed against her body. She slowly felt herself drift off into a comfortable sleep, feeling Big Mac's cock still inside her going limp and his cum warming her core.
Applejack looked over to the barn door and saw the first fireflies starting to light up in the dying light of the day.
"Applejack, Big Mac, supper's getting cold." Apple Bloom's voice shouted through the field of trees.
"Uh.. Big Mac, can ya go in and tell Granny and Apple Bloom that I'll be a mite longer going in?" Applejack murmured so she didn't wake up Rainbow Dash. "And try to clean up a little bit yourself."
Big Mac nodded before gently pulling out of Rainbow Dash, her snores interrupted by a soft murmur as Big Mac's penis left her warm cave. A small stream of cum pouring out without his member keeping it inside her.
Applejack laid there for several minutes after Big Mac left, holding Rainbow Dash close and staring out across the rapidly darkening field. She hoped once Rainbow woke up they could talk about what happened and maybe make this a more regular thing. But for now she was content with relaxing with her afterglow and letting Rainbow Dash's gentle snores cause her to drift off to sleep as well.
Apple Bloom and Granny might be confused when she never turned up to supper, but right now cuddling Rainbow Dash until she fell asleep was the best thing in the world.