"Is something wrong, sister?" Luna asked, questioning why she hadn't moved.

Celestia let out a small chuckle before saying, "I imagined that it would be a little bigger, is all."

Luna scowled at her. "I'll have you know that I can change it to whatever size I choose!"

"So why is it so small?"

"The size of it doesn't matter." She eyed Celestia's massive chest as she said this. Her own breasts were so tiny in comparison.

"Is somebody jealous?" she asked with a giggle as her hand briefly squeezed one of her massive boobs.

"I'm starting to like the idea of having you choke on it." she angrily replied.

Celestia began to idly fondle her sister as they spoke. "Oh? Then make it grow for me."

"I like having it small like this."

"Were you lying to me when you said you could change the size of it?"

"Would you like me to enlarge yours? I'm sure you'd enjoy that, whore."

"Tramp."

"Bitch."

"Slut." Celestia's stroking quickened.

Luna felt infuriated by her sister, so she replied with a shout, "Cum dumpster!"

"Cum dumpster?" Celestia began laughing at this insult. After a little bit, she calmed down, and said, "I've never heard that one before."

Luna smiled again. "You're certainly acting like it with that cock lodged inside you like that." She crossed her arms in front of her chest. "How many times have you finished inside yourself so far?"

"It would be three, if I'm remembering correctly. I might be off. These orgasms are starting to blur together."

"I wasn't able to make it to three. I couldn't keep going."

"Lightweight."

"Oh, just because you can take every cock in the kingdom doesn't mean I can."

"You've fucked the guards more than I have in only a year."

"If your promiscuity over the past thousand years is the same as it is now, then I have no hope of catching up with you and your gaping cunt."

"It shouldn't take that long with how much you open your legs around here."

"You're the whore here. Shining Armor told me about how you bedded six of the guards at once."

"So you did sleep with him! He's a married man, Luna."

"You've slept with him, too."

"That was before he got married."

"And afterwards."

Celestia had a smile on her face as she shrugged. She was right.

"And you slept with his wife, as well."

"I slept with both of them together. Although, there wasn't much sleeping going on. Shining really knows how to handle two women."

Luna let out a chuckle. She had done the same. "We're both dirty whores."

Celestia gave her sister a light slap to the rear. "Of course we are."

The sudden spank brought Luna's attention to the pleasure that had been building up as Celestia stroked her. She had almost reached an orgasm. She let out a moan.

Her sister smiled. She stopped stoking, and pulled away.

Celestia lowered her head onto her sister's crotch, and wrapped her lips around her member.

Luna placed a hand upon her head, enjoying this new thrill. Her sister was excellent at what she did.

She sucked on this new toy for a short while, listening to the various noises emanated by her sister. Alongside this, loud slurping noises accompanied her sucking.

Luna didn't last long inside her sister's expert lips. She placed both of her hands on Celestia's head and pushed downwards, loudly crying out in pleasure.

Her cum spurted into Celestia's mouth. She looked up at her sister as she began to swallow, at the same time sucking harder on it.

Luna's fingers curled into her sister's hair as the pleasure flowed through her body. She looked down at her.

Celestia pulled her out, and lifted her head. Luna seemed to have a sort of bubbly reaction to it. She had a goofy grin, and was giggling.

Luna wrapped her hands around her sister, and brought her closer for a kiss. This time, Luna allowed Celestia to lead.

Celestia stroked her sister's member as she played around in her sister's mouth. They disconnected after her stiffness had returned.

"You know, six guards is just one of the more recent of my numerous orgies."

"Is that so?" Luna asked, reaching her hand towards her own member and relieving her sister of the task.

"I've been with much more guards at once. At one point, I was even raped by them."

"You? Raped?"

"Well, they held me down and forcefully took turns. I suppose it wasn't exactly rape, but I like thinking that it was. It was amazing. I can't even remember how many times I came from it. I was covered almost head to toe in cum and I could barely move for the next few days. It was enough to make me pass out. And I know they were still going because I don't remember a great deal of it."

"Sounds interesting."

"You know I'm going to have you raped by them next, don't you?"

"I assumed as much. We'll talk more about that later. Or rather, I suppose we won't talk about it. So you do have limits, hmm?"

"It took the entirety of the guard force more than three hours to make me pass out, but yes, if you want to see it that way, I do have limits."

Celestia briefly pressed her lips against the tip of her sister's member.

"Let me up, sister." she stated with a moderately serious tone.

Celestia happily obliged. Luna got back off of the bed, and stared at her sister's ass.

Her hands grabbed onto it yet again. This time, she prodded her newly formed member against her ring.

Celestia whimpered.

"I trust you are prepared for this, sister."

"Oh, I'm more than ready..." she replied.

Luna spread apart her sister's hips with her fingers as she poked her tip against her hole.

"You like that, big sister?" Luna asked, pushing against it. The combination of their saliva would've allowed her tip to easily slide inside, but she didn't do anything else... yet.

"I do... This is fun, Luna. Where did you learn this spell?"

"I actually learned it from your student while she was here last. She was quite a wild woman with her newfound limb, but wasn't able to play for long."

"We should invite her here next time we do this."

"Maybe. Or possibly Cadence. I know she'd enjoy this spell."

"Perhaps all four of us Princesses could have fun with this spell of yours.

"I'd certainly like to see how our niece reacts to having a new plaything."

"You must teach me how to do this."

"In time, sister."

She chuckled for a reply.

She began to push again. Celestia could feel her slender penis start to slide into her tight rear.

Luna let out a groan of pleasure as her sister's tight ass sucked her sensitive cock inside. Celestia's voice sounded off as well. She enjoyed this feeling.

Luna pressed her hips against her sister's round butt, cock dug inside. Her hands grabbed tightly onto Celestia's rear. Her skin was squishing out between Luna's fingers.

Celestia could feel it rubbing alongside her own toy inside her. Luna's every move was making her feel so good.

"Mmm..." Luna rubbed her sister's rear with a hand. "Your ass feels amazing, sister."

Celestia took in a jagged breath as her sister continued. Her parts rubbed together each time Luna thrusted inside. She couldn't separate them in her head.

Celestia's beautiful voice rung out in pleasure.

She felt Luna's body press against her back, and her hands reached around her body and grabbed onto her soft, round breasts.

"That's it... Take your sister's cock." Luna was starting to talk dirty right next to her ear. "Your ass is so tight. You like this, don't you?"

Without hesitation, Celestia cried out, "Yes!" She didn't bother to conceal the lust in her voice. Her erotic tone bolstered Luna's movements.

Celestia's tongue hung freely from her mouth. Her hand lifted from the bed, and moved to her crotch. She moaned even louder as she began to rub herself.

Celestia had expected Luna to be larger, but it was as if she was the perfect size for her greedy little ass. Long enough to rub her most sensitive areas, but slender enough to slide in without slowing.

She said that it was normal size. Maybe her sister was just naturally perfect for her ass.

She could hear small moans from her sister. A few moments later, Luna began to lick the tip of her ear.

Celestia knew that her sister was close. She was even closer. Her body was starting to clench up, and her entire nether region was burning fiercely. "Ahh! Faster, Luna! Harder! Make your sister cum!" she cried out.

Luna did her best to satisfy her sister. Her thrusts quickened, but not for long. She soon let out a loud groan, and lodged herself inside.

Celestia felt cum pour into both of her holes as she was pushed over the edge yet again. Luna in her ass, and her own cock in her pussy. Her mind went blank as the pleasure effortlessly overwhelmed her.

Luna was grinding into her ass as she spurted inside, squeezing tightly onto her breasts. Celestia loved this feeling.

Her pussy was contracting hard, and her ass even harder. Her body was hungrily milking the cocks inside, causing more and more cum to spill out.

After she had finished, Luna pulled out of her sister's twitching asshole and idly fondled her chest as she waited for her sister's orgasmic high to settle.

Celestia was gasping for breath. It was finally over, and she felt exhausted. After Luna got off of her, she fell to her side and began to rest herself.

A hand touched her dripping nether region. Luna wasn't finished yet. That meant that Celestia wasn't finished either.

"Alright, it's time I saw this toy of yours." she said to Celestia, tugging on the cock buried inside her pussy.

Celestia let out whines of protest as her sister pulled on her sensitive member, but did nothing to stop her.

Luna began to get frustrated at how difficult this was. Soon enough, she simply gave up, placed a hand over Celestia's crotch, and cast a spell.

A strange feeling emanated from her crotch. The strain inside her pussy lessened as she felt her member begin to shrink in size. Luna started to pull again, and this time, was able to dislodge the penis from her sister.

Cum flicked onto the two of them as Celestia's cock showed itself. It quickly grew back to its typical enormous size once the spell faded. Her cock juice dripped from her now unplugged hole.

Luna marveled at the size of her sister's member.

Celestia sat up, and looked to her sister's face.

"You really can change the size of it..." Celestia said in astonishment.

"I didn't expect it to be this big." her sister replied, lowering her head to it.

Luna's soft lips pressed against the tip. Her hands grabbed onto Celestia's butt as she began to take her cock into her mouth.

Celestia moaned, and placed a hand on her sister's head, with the other grabbing a breast.

Luna was so good at this. It felt even better than when she had done it to herself. Her tongue expertly rubbed around it as it went deeper into her mouth.

Celestia felt it bump against the back of her little sister's throat. Luna's hand wrapped around the remainder of it, and stroked it as she sucked. Her second hand grabbed onto it, and there was still room to stroke. She bobbed her head back and forth as her sister's cock twitched in her mouth. The smell of her sister's cum-covered cock was so enticing.

Luna pulled it out a little, took a deep breath, and plunged it into her throat.

Celestia gasped. Her sister was effortlessly deepthroating her massive cock. Luna sucked hard on it inside her mouth.

Without realizing it, Celestia was pushing down on Luna's head, keeping it inside her throat.
Luna had fully expected this. She was no stranger to this kind of thing, and was able to last for quite a while. She continued to suck on her sister's cock.

After around a minute of this, Luna raised her hand, and gave her sister a hard slap on the rear. Celestia yelped, and let go of her head.

Luna lifted her head back up, and looked up her sister's body. She was panting. Celestia's cock was freely dripping with pre-cum.

"Now it's your turn, big sister." Luna said, mounting her. Her wet pussy rubbed along the length of Celestia's cock.

She lifted her body, and prodded herself with the tip.

Celestia stared right at her sister. She wanted this. She wanted it so much.

Luna pushed herself downwards, and moaned as the tip penetrated her. She started sliding down, taking more and more of it inside her pussy.

Celestia's hands gripped her bedsheets, and she couldn't keep herself from crying out in pleasure. Her sister's pussy was much tighter than she had expected. Even tighter than her own.

Luna's toes curled as her sister's cock went even deeper. It was so thick. Her insides were starting to hurt. She was being stretched to the limit, but there was still more left.

Their hips finally touched. Luna had taken every inch of Celestia's amazing cock. She was aching inside, but she loved this feeling.

They looked directly into each other's eyes. Luna dropped down, and their lips eagerly connected in a deep, passionate kiss.

Luna twitched around her sister. Celestia's fingers had entered her ass again. Luna moaned into her mouth as they continued to share their kiss. Her arms wrapped around Celestia's back.

Celestia started to lightly thrust inside her sister. Luna's insides were twitching, and her member was rubbing between their stomachs. She felt so good.

After some time like this, Luna finally pulled away. She started to hump her sister's enormous cock, moaning loudly in the process. A bulge formed in her stomach from it.

Her own penis was flopping up and down as she moved. Pre-cum flung onto her sister's body. Celestia grabbed onto it, and stroked the unimpressive shaft as her own cock was being buried deep within her sister.

Luna pinched one of her nipples, and lowered a hand to her crotch, batting Celestia's hand out of the way.

Luna's eyes began to water, and her voice grew even louder.

She let out a cry as she began to cum. Luna's tight pussy squeezed her sister's cock even further as cum spurted from her rod. She watched as her thick love juice landed on Celestia's chest and stomach.

It was so filthy. She loved the sight of it.

Juice squirted from her pussy onto her sister's hips. Luna ground her pussy around in a lust fueled attempt to make this powerful orgasm feel even better.

More cum spurted onto her sister. The enormous cock inside her felt so good. Her whole body felt great.

Celestia let out a chuckle as her sister's orgasm finally passed. Her own cock was still so hard inside her, and her sister's hadn't gone down at all.

Luna laid down on her sister, smearing her warm cum between their bodies.

Once more, a finger had been inserted into her rear. Celestia felt her pussy twitch as she fingered her sister's butt.

Luna started to move back and forth along her sister's body, sliding her cock in and out a few inches each time.

Luna pressed her lips against her sister's. This kiss was brief.

"You still want more, don't you, you greedy whore?" Celestia asked.

Luna nodded. That was all she needed to do.

Celestia started to move. Her cock pressed against different places inside her sister as they both got on their knees.

Luna didn't pay much attention to what was happening, or rather, she couldn't take attention off of the feeling in her crotch.

Soon enough, Luna's chest had been pressed against the bed, and her ass was in the air, met by her sister's hips. Her hands grabbed onto the bedsheets as Celestia grabbed onto her small butt.

Celestia pulled back. Luna squealed as her sister moved. It felt so good. She thrusted into her sister. Luna's sensitive pussy eagerly took it in.

Celestia began to pleasure herself with her sister's amazing pussy, thrusting inside as hard as she wanted with no care placed in her movements.

Even she knew that she wouldn't last long. The pleasure was building rapidly as her sister cried out in response.

"It feels so good, sister!" Celestia let out as her cock dug inside. "Ahh! Your pussy feels so good!"

Celestia couldn't stop herself from moaning in pleasure. Her sister felt so amazing around her. Just a little more...

Luna's tight pussy was too much for her sister. Celestia rammed her cock deep inside, and cried out that she was going to cum. Luna's body tensed up at the sound of it, including her nether region. This sudden twitch pushed Celestia over the edge. She quickly exploded inside. Luna cried out as her sister's cum poured inside her pussy.

Celestia groaned as she came. More and more cum flowed deep inside her little sister.

Luna happily allowed her sister to fill her pussy with cum. It was so hot. She loved it.

With each and every spurt, Celestia's mind was set ablaze with pleasure. It was almost as good as when she had finished inside her own pussy.

She finally pulled out of her sister, and subsequently collapsed backwards, cock still standing at attention. Cum dripped from Luna's pussy.

She knew Luna wasn't done. She wasn't done either.

Luna got back onto her sister. Her pussy rubbed against Celestia's long member, and her cum dripped around it onto her body.

Celestia moaned in pleasure. She was so sensitive right now. Luna listened intently to her moaning. It's usually somewhat difficult to make Celestia let out these sounds, even for her. Now she was doing it without effort.

Luna got off of her sister, and moved to her knees behind her. Celestia felt the tip of her sister's penis prod against her dripping wet pussy.

Her legs twitched upwards as it was pushed inside. It felt good, but the small size of it made the whole experience lacking. That is, until Luna grabbed onto her member and started to stroke.

"Mmm... My big sister's pussy is so tight." Luna said with a moan, starting to thrust into her sister.

Celestia watched as her sister's hands eagerly ran along the length of her slimy cock. The way she rubbed against every part of it felt even better than her sister's penis inside her.

Luna, however, was concentrating most of her effort into thrusting inside. Her sister's pussy felt amazingly good. It was almost as tight as her rear.

Luna mindlessly played with her sister's member as her cock sunk into her pussy. Even though she was barely trying, Celestia was moaning so loudly.

Luna let out a few moans as she happily dug herself into her sister. After just a few more thrusts, she came again. Luna moaned loudly as her cum spurted into her sister.

Celestia looked at the pleasure that showed on her sister's face. She could feel her cum flow inside. There wasn't a lot of it compared to her own orgasms, but she still enjoyed the feeling of it.

Luna pulled out, hands still firmly gripping Celestia's member. She started to stroke her again.

Luna soon let go, eliciting a noise of complaint from her sister. Luna placed her sister's cock between her small breasts, and squeezed them around it.

She moved her chest up and down the length of her sister's slimy cock, taking the tip of it into her mouth as it neared.

Luna looked up to her sister's eyes, and Celestia whined from pleasure as her soft lips engulfed her fat, pink tip time and time again. She loved looking at her sister like this.

Luna furiously rubbed her breasts along Celestia's member, squeezing them around her and moving along the length of it.

Luna wasn't done yet. She pulled away from her sister's throbbing cock, and lowered her head to the base of it.

"You know, I learned a little trick while I was experimenting with your student." Luna said, grabbing onto her sister's rear.

"A trick? What kind of trick?"

Luna's thumbs began to rub the lips of her sister's wet pussy, and her tongue was pressed against her exposed clitoris. Celestia whined again.

Celestia began to stroke her own cock, and as she did, she groped one of her large breasts.

This feeling that her sister gave her was different than it should've felt. It was much more pleasant. Her pussy was burning, and she felt like she could cum at any moment.

Luna's lips surrounded her sister's button, and she began to suck, thumbs still rubbing along her soft, wet lips.

Celestia's hand moved faster. Her moaning got louder as her hand stroked faster and faster until finally, she had reached a climax.

Pleasure charged up the length of her cock and spurted onto her body.

A trail of hot semen landed on her face. Luna's lips still surrounded her sensitive clitoris.

More and more cum gushed onto her body again and again. This orgasm was unlike the others. There was much more cum than before, and it kept coming out. Her body was getting covered by her thick love juice. The pleasure was overwhelming.

More landed on her face. The majority of it was landing on her large breasts or her stomach. An impressive amount of liquid had sloshed onto her body.

Luna finally pulled away from her dripping pussy, and chuckled at her sister, who was letting out strange, gurgling noises.

Her cum covered body was a sight to behold. Luna's eyes widened in amazement. She smirked at Celestia.

"Did you enjoy that?" she asked, moving up her body, lowering her tongue to it.

Like before, she began to slowly lap up the cum from her sister's curvaceous body. Each lick brought Celestia more and more pleasure.

"T-that was amazing..." she replied, breathing heavily.

"You came like a horse, sister."

She was focusing on Luna's soft tongue. Her sister was starting to move up her body. Unlike last time, there was little effort to clean it all. Luna quickly reached her breasts.

She groped her sister's soft, sticky boobs, first licking the underside, then licking her nipples. Luna's lips covered one of Celestia's nipples, and she began to suck hard on it. Her tongue rubbed against it in her mouth. Her fingers were pinching and twisting her other nipple.

She raised herself, and started to lick the cum from her sister's face. Celestia stuck out her tongue and rubbed it against Luna's face.

Luna took her sister's tongue into her mouth, and pressed her lips against her.

She climbed on top of her, and Celestia felt her sister start to prod her tight, hot pussy against the tip of her member. Luna's face was red, and her eyes were full of lust.

Celestia grabbed onto her sister's hips, and pulled them away. Luna's soft lips pulled back as she felt her sister press against her tiny back hole.

Her eyes widened as Celestia pulled apart her hips, spreading her tiny hole.

"C-Celestia..." she got out, putting a small amount of effort into pulling away.

"Resisting is only going to make me harder, sister." she replied with a laugh.

"B-but you..."

"Don't worry, I'll be gentle. At least for a little while."

Luna allowed her sister to prod her little ass with her massive cock. Right now, it felt rather nice.

"What's with that look, sister?" Celestia asked, "I know you've had bigger things in there."

She wasn't wrong, which Luna knew meant that she couldn't make an excuse.

Celestia started to get serious about what she was doing. She pushed hard as she pulled apart her rear.

Luna moaned as the tip finally pushed inside. It was so thick.

Her ass was far tighter than Celestia had fantasized. As her massive, cum-covered cock pushed forward, she couldn't keep herself from moaning in pleasure.

Celestia waited where she was for a little while, then pulled back out. Once more, she pushed her tip into her sister, then pulled away.

This time, she didn't pull back. Luna slowly took inch after inch inside of her tiny asshole. The deeper it went, the better it felt. Before she knew it, she was sitting right on top of Celestia's crotch. Every little bit of it had been pushed inside.

It felt amazing.

Celestia rubbed her sister's rear with her hands.

"It's throbbing..." Luna moaned, her ass twitching in response.

Celestia smiled. "I'm going to move you now, sister." she said, slowly starting to sit up. Her arms wrapped around her sister's back as their chests were pressed together. Luna started to grind her body against Celestia, kissing her neck as she did.

Celestia laid her sister on her back, then grabbed her legs, and held them up with her hands.

She got a good look at her small body. Cum had been smeared all over her small chest and stomach. Her eyes were watering, and her tongue was hanging out of her mouth. A trail of drool was dripping down her face. Her fingers gripped the bedsheet tightly. Pre-cum dripped from her small penis.

Celestia started to pull back. Luna's eyed widened in pleasure, and her grip on the bedsheets tightened.

Celestia very slowly thrusted into her sister's tight ass. The pair of them were moaning, although Luna's moans were much louder and higher.

Celestia's fingers gripped her sister's legs tightly. This feeling of digging deep into her own sister's tight asshole was amazing.

Luna enjoyed every agonizing movement her sister made. Her body was so hot, and her ass was even hotter. She was enjoying this far more than her sister could imagine.

Celestia rested her legs against her shoulders, and leaned down, placing her hands on either side of her sister. She started to thrust harder, moaning as she did. Her sister's ass eagerly took every thrust she gave her, and her eyes rolled back in ecstasy.

A loud sucking sound accompanied every slap their hips made as Princess Luna's ass was violated again and again. Celestia's thick cock tugged hard on her sensitive inner walls.

Celestia's body arched upwards as she thrusted. Her eyes gazed at the ceiling as drool dripped onto her sister.

Her cock was burning. It felt so good. She never wanted this feeling to end. She moaned with her sister as she sank deep into her time and time again.

Luna's voice got even louder. Before anything else, Celestia could feel her sister's insides twitch violently.

Luna screamed.

Hot cum spurted from Luna's rod as she reached her climax. Her asshole squeezed tightly around her sister each time another stream of her juice spurted onto her body.

Celestia looked down at her sister's face. She was writhing in pleasure. Some of her cum had landed on her face. Her cock was still lodged firmly within her sister's convulsing asshole. Every twitch Luna made felt so good.

She started to move her cock a few inches in and out as the pleasure built. One last squeeze from her sister was all it took for her to finally cum.

Luna screamed once more as she felt her sister's hot cum fill her greedy asshole.

Celestia's voice grew louder as she came. Each spurt of cum brought pure bliss.

The two sisters enjoyed their orgasms for quite a long while until they finally calmed down. Celestia was still buried into her sister's asshole.

They gazed into each other's tired eyes. Celestia dropped onto her sister, and began to kiss her.

She lightly thrusted into her sister. Her cum sloshed around inside Luna. Their bodies rubbed together. Luna was moaning as Celestia moved inside her.

After a little while, Luna could feel her sister's cock start to pull out of her body. Every inch she moved felt like it took hours.

Celestia had finally pulled out. Luna's asshole dripped with her cum, and a trail of it connected to Celestia's penis.

She got off of her sister, and laid down next to her. If Luna had wanted more, she would still be able to provide it, but she preferred to rest.

Luna didn't move for a time. She was tired, but she didn't want to admit defeat just yet. Her legs were somewhat numb, and her rear was sore. Celestia was not kind to her butt.

She sat up, and stared at her sister's penis. An idea ran through her head, and she got a smile on her face.

"Stand up, sister." she said to her, getting off the bed. As her legs touched the ground, they wobbled, and she held onto the bed for support.

"Stand up? Why? Do you want it from behind?"

Luna simply stared at her sister with her arms crossed until she moved. Celestia noticed that Luna's penis was hard as a rock.

"Alright, fine."

Celestia stood up in front of her sister. Luna pressed her lips against Celestia's for a brief moment, then lowered herself to her knees. Celestia watched as she took her soft, sensitive member into her mouth.

Celestia moaned as her little sister sucked on her growing cock. Her hands held her sister's head.

Luna slowly pulled back as she sucked. Her sister was hard again, and her thick tip was in her mouth. She looked up at Celestia as her tongue played with her tip.

Her sister's fingers tightened in her hair. Luna started to move forward, taking her sister's long cock into her mouth. Just like before, her tip bumped against the back of her throat.

Celestia moaned. Her little sister's mouth felt so good. Much better than when she had done it herself. She almost burst out laughing as she realized that her little sister gave better blowjobs than she did.

Luna pulled back a little and rubbed her sister with her tongue. She took a deep breath, then slid her sister's fat cock down her throat.

Celestia gasped as her sister's tight throat squeezed her cock. She felt something press against her rear. Her sister slid a finger into her butt while her lips gripped the base of her member.

She stared up at her sister, who was in a world of pleasure. She was in a position Luna had never seen her in. Her hands were holding onto her head, and she was pressing her sister against her hips. Celestia's body arched above Luna's head.

Celestia started to move. She pulled back, then pushed herself back inside her sister's mouth. She did it again. At first, she moved slowly, but her thrusting began to quicken, giving Luna no time to catch her breath.

She was at her sister's mercy as her hand lowered itself to her crotch. Initially, she had wanted to do this herself, but now she was being turned on by her sister's forceful movements. She wanted her sister to fuck her mouth harder.

"Ahhh! L-Lunaaa!" Celestia cried out, "Your mouth feels so gooood! Ooohhhh... It's so tight, sister! I can't stop!"

Luna's nails started to dig into her sister's rear. She was reaching her limit. Celestia didn't show any signs of stopping. The grip she had on her head had only tightened. Luna was starting to choke. She rubbed herself harder. This wasn't the first time she had been brought to this point.

Her throat shook around her sister's cock, causing Celestia to let out a cry of pleasure.

Celestia screamed. Her crotch pressed hard against her sister as she finally came.

Stars began to form in Luna's eyes as her sister's cum flowed down her throat. Tears were beginning to stream down her face. She whimpered. This was going to be close. This still wasn't the first time this had happened to her. In fact, even her sister had brought her to this point before.

Luna began to pull away from her sister. Celestia's grip didn't loosen, but her orgasm was making her body weak. After a few seconds, Luna had dislodged her sister's cock from her mouth.

Celestia came on her face.

Luna took a deep breath and started to cough. Her sister was still holding her head tight. There was nothing she could do to avoid the next few streams of her sister's cum from splashing onto her face and dripping down her chin. Some landed in her mouth.

Her sister's moaning turned into heavy breathing. Her twitching cock was just inches away from her sister. She slowly dropped to her knees, panting. Her hands dropped to Luna's shoulders. She looked up at her cum covered face.

Celestia chuckled weakly. She felt almost delirious. "Are you alright, Luna?"

Luna didn't answer. She just stared back at her sister.

"Here, let me take care of that for you." she said, pulling her sister in close as she stuck her tongue out. She started to clean her sister's face with her tongue.

Luna's body twitched. She loved this. The feeling of her sister's soft tongue gently running across her face. It was making her feel so hot. She was almost melting under her sister's touch.

Celestia reached around Luna's head, and pressed her lips hard against hers. Her tongue went into her sister's mouth as she cleaned every drop of cum inside.

She pulled away, a trail of their sticky saliva connecting them.

Luna stood up in front of her. Celestia stared at her sister's member. It was dripping with various juices. Her face slowly approached it, and just as her lips were about to close around it, Luna said, "Stand up, sister."

Celestia looked up, mouth half open. Her sister extended a hand to her, which she took. Luna pulled her up. Her legs wobbled as she rose.

Celestia was standing in front of her sister.

Luna smirked at her, then shoved her backwards. Celestia let out a yelp as she tripped onto the bed. Her sister quickly crawled on after her, and grabbed onto her legs with a hand. She lifted them into the air, and placed a hand on her sister's big, soft rear. She looked into her sister's eyes as she gently rubbed it. Her hand grabbed onto her skin, and squeezed tightly.

Her small penis began to slide between her sister's thick legs. Her hand still rubbed her butt.

For Luna, this felt great. For Celestia, it was pleasant. She was allowed to rest after she had treated her sister like that. Her penis was rubbing along her slit and against the base of her thick member.

Luna's hand rose. Celestia watched as her rear was struck by her sister. She let out another yelp. Her sister had hit her hard.

Luna wanted to punish her sister for what she had just done, even though she knew her sister would only enjoy this. She was spanking her sister's round butt.

After a few more slaps, Luna let go of her sister's leg. She stared at Celestia's cock. It had hardened again after the beating she had delivered.

This was the final part of her plan.

She climbed onto her sister, and lightly prodded the tip of her sister's cock against her tight pussy. Celestia looked up at her with an almost pleading expression.

Luna pressed downwards, taking her sister's cock into her body once more. Celestia moaned, and grabbed onto her bedsheets. Her sister was already writhing in pleasure underneath her. Her cock was throbbing inside her pussy.

She thrusted her body down, a loud squishing sound each time her tiny pussy took her sister's cock. Celestia couldn't control her breathing.

Just as she had thought, her own orgasm was approaching first. She pressed down hard, taking every inch of her sister's cock. Her crotch ground against her sister as her hand began to stroke her own member.

"Big sister..." she moaned out, "Biiiig sister... Ahhhh... F-fuck... Your cock feels so good, sister. My pussy can't take it. It hurts, sister... Ahhhh..."

Celestia's hands grabbed her sister's hips as she moved.

Luna let out a loud cry as she began to cum. Her liquid spurted onto her sister.

Celestia let out a cry as well. "Luna... It's so tight. It's squeezing me so tightly..."

Luna's insides clenched hard around her sister. Her body was burning with pleasure.

Her orgasm was more powerful than she had prepared for. She sat on top of her sister for a little while before she was able to continue. Even more of her cum covered her sister.

Celestia's moans quickly got louder and louder as Luna's body moved again. Luna smiled.

Celestia began to sit up. She wrapped her arms around her sister, pressing her sticky body against her. Her hips began to buck against her sister. "It feels so good, Luna!" she cried out, "Your pussy feels so good... Ohhh..."

She let out a loud cry of pleasure. She squeezed her sister tightly as she came inside. Her sister's insides felt so good.

Luna let out an involuntary cry every time her sister's cum shot into her. There was so much of it.

Their bodies ground together.

"Yes! Take my cum, sister!" Celestia cried out.

Celestia was having a hard time controlling herself. She was exhausted, and her sister wasn't helping that fact. She didn't even notice that her sister's arms were around her as well.

By the time her senses came back to her, Luna was already thrusting down the length of her thick cock. Celestia was still in her arms.

"It feels so good, Luna..." Celestia let out once again. Her voice was weak, and she was drooling.

She felt so sensitive. It was almost painful. Her sister didn't let her rest. Luna was furiously sliding up and down the entire length of her cock, stopping just at the tip before slamming back down.

Celestia couldn't do anything but moan.

Luna pressed downwards with a loud squishing sound. Celestia felt her rub her penis against her stomach. Luna's insides rubbed against her.

Luna moved her mouth next to Celestia's ear. "Cum inside me again, sister... I want to feel your hot sticky cum flow into my tight, wet pussy."

She felt Celestia's cock throb inside her as she began pressing her lips against hers.

"My little sister's pussy feels so good." Celestia moaned out. Her cock throbbed again.

Luna smirked. She slowly set her sister back down on the bed, and sat back up.

Celestia whimpered as her sister continued to hump her. Her tight pussy gave off lewd noises as Celestia's cock disappeared inside. Her insides sucked on her sister's long member.

Just as she had wanted, her sister's voice grew louder. Celestia was being defeated by her little sister's soft pussy.

Just as the explosion of pleasure was about to flow into her sister, she felt a tight pressure around the base of her penis. She looked up to see that both of Luna's hand's were wrapped tightly around her massive rod, not allowing her to finish.

Even though she wasn't a man, her orgasm was still being held off by a trick like this.

She whined at her sister, who's movements haven't stopped in the slightest.

"L-Luna!" Celestia cried out her sister's name. The pleasure inside her body was still growing.

Luna moved faster. The longer she dragged it on, the more chance there was of her losing her grip.

Celestia's fingers dug into the bed as her sister continued to hump her. Her cock was burning, and her eyes were watering. She felt Luna's pussy start to twitch around her.

Suddenly, she let go of her penis. Her cock juice quickly shot into her sister. Both sisters began to scream as their orgasms wracked their bodies.

Luna's pussy was convulsing around her sister's cock as stream after stream of liquid spurted inside her. The rhythmic contractions of her body was milking her sister for everything she had.

Celestia came deep inside her sister over and over again. Liquid was dripping out of her almost as fast as it flowed inside. Her cock was pulsing inside her tight, little hole.

Luna leaned forward and held herself up with her hands. She looked at her sister's face. Celestia was still writhing in pleasure. Her own body was still shaking. Her arms were wobbling.

Luna's orgasm came down first, but her sister's lasted a while longer, which also meant that her hot liquid continued to flow into Luna. Celestia's eyes were rolled back, and her eyelids were fluttering.

Luna was waiting for the her sister's last spurt, but it seemed like it would never happen. She had already been filled past her limit. Celestia's cock juice was spilling out from around her member like a faucet.

And finally, after what seemed like hours, the moaning finally stopped. Deep, labored breathing took its place.

Luna lowered herself to her sister's chest and looked up to her face. "What now, sister?"

Celestia lowered her hands to Luna's butt. She was lightly squeezing her soft skin.

"Did I ever tell you that you have an amazing ass?"

"You have. A number of times."

"Good."

"So..."

"Hmm?"

"What now, sister?" she asked, kissing Celestia's chest.

"Mmm... Tired."

"What? You? Tired?"

"Is that so hard to believe?"

"It's hard having a penis."

Luna giggled. "So it is. Alright, I'll let you off this time, but next time... I get to be the big sister."

"Heh... Alright."

Celestia let out a small laugh. Her hands wrapped around her sister's back.

"Goodnight, sister."

"Goodnight."

And legend has it that the two princesses were glued together ever since. The end.

You're never going back to that bookstore again, Luna.

Author's Note

This went exactly how I wanted it to go