A Sister's Love

by MetalJrock

Rating: mature
Tags: Sex, Slice of Life, Sweetie Belle, My Little Pony: Friendship is Magic, Alternate Universe, Rarity, Romance
Length: 4036

Rarity wonders if she should take the next step of her illicit relationship with Sweetie Belle.

Following the events of Forever Filly, Rarity feels as though she and Sweetie Belle are ready to take their taboo relationship to the next step as an apology for her earlier actions in doubting her maturity.

But some doubts linger in Rarity's mind. The idea that maybe advancing so fast with Sweetie was a mistake and could hurt her.

Warning: Consensual incest, foalcon, self doubts of taboo and clop.

Published 2017-10-09 16:10:06 UTC
Last updated 2017-10-09 16:10:06 UTC

The Night Together

Rarity sighed, feeling content after another long day. Her body laid upon her couch, tired after spending the day with her sister, Sweetie Belle. Said filly was resting on her chest, looking just as tired as her and the older unicorn smiled.

"I do apologize again for grieving you, Sweetie Belle..." Rarity apologized softly, combing her younger sister's mane, "I hope you can forgive me for acting so foolish."

It truly was a long day. After having not seeing her sister for a while, Rarity decided to come back to Ponyville from Canterlot, trying to bond over the things she did as a child. However, Rarity learned that her little sister wasn't as little as she remembered. An ephiphany that she thought she learned not too long ago.

Sweetie smiled back and leaned her head towards Rarity's muzzle, "I already did, Rarity." she could feel the mare's breath on her face, able to smell her perfume. It excited her and she wanted to show Rarity how much she forgave her.

Then the two shared a kiss. Like they've done many times before. Rarity and Sweetie were still able to taste the ice cream stained on their lips, but that didn't matter to either of them. Instead, they were focused on the passion and love they shared. Rarity cupped her sister's head in her hooves to raise it slightly so their mouths were level.

Sweetie moaned, able to feel Rarity's tongue invading her mouth again. She returned he favor in kind. This felt different for Rarity than before, as if all her exhaustion, her concerns, faded with this one action from her little sister. And it pleased her.

This was as far as Rarity was willing to take their relationship. Obviously, she told Sweetie it had to remain a secret, something she understood immediately. Rarity didn't mind it though, since her little sister was still young. It had been like this for a while now, since sometime after Sweetie got her cutie mark.

The confession she gave flashed back in the older unicorn's mind as her lips distanced away from Sweetie's, a soft "mwah" heard from Rarity as she held her sister's cheeks. That was the day they shared their first kiss, the first of many actually. Again, this was the farthest she's taken her relationship with Sweetie.

A soft yawn escaped the younger unicorn and she rested her head on her older sister's chest. Rarity smiled, combing her sister's mane. However, she felt something in between her legs in the moments they kissed. A yearning. Lust... She bit her lip at the idea.

True, she made her love for Sweetie known. A secret taboo love, but it was a mutual relationship. But Sweetie was still young, innocent. Rarity kept things to kissing for a reason after all. She wanted to wait until Sweetie was older until they engaged in such adult things. Some things were meant to be sacred according to the older unicorn.

But at the same time... She wanted to prove that she thought of Sweetie as a maturing mare. To prove that she didn't think of her as just a filly anymore. The burning in Rarity's nether regions was proving harder to ignore too.

Yet... It all made for a conflicting series of thoughts. Rarity frowned, wondering how she should take this. She was holding the prettiest pony she ever laid eyes on, the one who stole her heart. The filly she help raise from birth becoming an independent mare every passing day. The one who could tolerate spending time with her despite every petty argument they've endured.

The romance was taboo, Rarity already understood that much, it took a lot to leave things be. Yet everytime she looked at Sweetie Belle, her mind raced back to that. She wanted to be with her, to confess her love. Which she did.

It was getting to a point where Rarity wanted more. But she was afraid for Sweetie. The older unicorn thought that maybe her mind was taking things too fast and that where they were at was perfectly fine for a few years: a lot of kissing and perhaps some talks of romance during their time alone. She was afraid that it would ruin the bond they had, that by engaging in sex, there would be no turning back.

"I love you, Rarity..."

Rarity was knocked out of her thoughts, "Hm?"

Sweetie repeated herself after pecking Rarity's cheek, "I love you. I know you meant well. I thought you were still upset about it."

The older unicorn blinked, "No no, Sweetie dear, I was thinking about something else. I love you too." she said, kissing her younger sister's horn gently.

There was that feeling in her gut... And between her legs again. Rarity bit her lip again and her eyes gazed towards her room. She gulped, wondering if she was about to make the right decision, "Sweetums..." she cooed her sister's nickname.

"Huh?"

"Would like to sleep in my room with me tonight? Perhaps we can... Kiss some more in there if you wish." Rarity offered slowly after another gulp. It wasn't a complete lie: they would kiss, but Rarity would do a little more than that.

Sweetie Belle sat up, "Okay!" she loved kissing Rarity. Everytime she did, she felt butterflies moving in her stomach. And it wasn't the first time Rarity offered to go to her room either, but she didn't notice how hesistant her older sister was about it so it was like usual.

Sitting up, Rarity exhaled, "Very well, then. Do come on then."

The two sisters made their way upstairs, Rarity pondering what she was about to do all the while. She wondered if this was truly the right call. That this may be too fast for their relationship.

However, those thoughts were shoved aside once she saw Sweetie Belle hop onto the bed. "Are you tired, Rarity?" she asked. Rarity dimmed any lights and closed the curtains, leaving the two to themselves.

"Yes... A little, dearie." Rarity said, sitting on the bed herself. The two unicorns pressed their heads on the pillow, gazing into each other's eyes. The older sister stroked her sister's cheek, "But I really did wish to spend tonight with you." she kissed Sweetie's forehead for comfort, herself moreso.

Sweetie tucked herself under the covers while Rarity used her magic to do the same. She kissed Sweetie's cheek, which the filly returned in kind a second later.

Rarity was awfully silent, moving her hoof to Sweetie Belle's stomach. Then in between her hindlegs before finding something warm and wet. The younger unicorn let out a surprised squeak once she felt her sister's hoof in between her legs, "R-Rarity? What are you doing!?" she asked quietly.

Then at the sound of her confused, and seemingly scared, voice, Rarity instantly stopped and raised her hoof away from her once desired spot and frowned, holding back a small sniffle as she realized what she's done, "I'm so sorry, Sweetie!" she snapped a little louder than Sweetie expected. Then in a haste she bolted out of her room tearfully, leaving the filly a little more than confused as to what just happened.

In the room where she usually works on her orders, Rarity sobbed to herself, sitting on a table with her head planted in her hooves, 'What was I thinking?!' she thought, 'I nearly violated my dear sister!'

Her saddened howls could be heard all throughout the boutique. She was disappointed in herself.

"I-I can't...!" Rarity whimpered.

"Rarity?"

Sweetie Belle's soft voice made Rarity jump. Rarity looked a reflection of herself, tears staining her cheeks and eyeshadow. Her mane was already a mess. 'Oh dear...' sighed Rarity inwardly, aware that she's made a fool of herself. "I-It's nothing, Sweetums. Do go back to bed. I'll be there in a minute."

"Not until you tell me what's wrong. I can tell when you're upset. Did I do something wrong?"

Gulping again, Rarity closed her eyes, "I'm fine, Sweetie. Just... feeling a little guilty is all."

Tilting her head, Sweetie Belle asked, "Guilty about what? I already forgave you for what happened."

"No... Not about that, darling." Rarity corrected, "About... Us."

"What about us?"

Rarity lowered her head, "You must think I'm a creep. I nearly violated you! My sister!"

The filly blinked again, "A creep? I don't think you're a creep."

"Please don't lie, Sweetie." Rarity nearly snapped, surprising the younger unicorn, "I wanted to prove that I thought of you as more than a filly. I embarassed you today..." she paused, "I just wished to show I loved you... And I... And I nearly took your virginity to prove it. You're so young, innocent... When you squeaked my name in surprise like that... I immediately realized I was about to hurt you..."

Sweetie frowned, "You weren't going to hurt me, Rarity. You just... Surprised me is all." she trotted closer to her older sister to comfort her, nuzzling her head on her neck, "Remember what I said when you said you loved me like a special somepony?" Rarity silently nodded, "I said that you're my big sister, and I know you will never hurt me on purpose. I still believe that."

"You still do?" Rarity repeated with some hope back in her voice. "How? After what I've done?"

Brushing her lips on her sister's tearstained cheeks, Sweetie continued on, "I trust you. You love me, and I love you. Nothing will change that cause I know you. You're the sweetest pony I know." she wrapped her hooves around Rarity, "We're special someponies, remember?" she said with a light giggle.

Rarity gave her little sister a small smile and sniffled, "But about earlier... I violated you... I knew you weren't ready for such things..."

"But what if I am?" Sweetie offered slowly. That made the older unicorn pause in her words.

"Pardon me?"

"If you think I'm ready... Ready to have... it..." Sweetie Belle droned for a bit, trying to find the right words, "Then I want to with you. You're the pony I trust the most."

Rarity muttered, "But what--"

She couldn't finish. Because her younger sister already closed the gap between the two of them, their lips now docked. Surprised, Rarity's eyes snapped open for a moment before the softness of her sister's lips comforted her. Rarity wrapped her hooves around Sweetie, holding her in a tight hug.

That feeling of desire, the itch that was felt in Rarity's marehood came back again. But this time, strangely enough, she wasn't afraid. Nothing but lust and passion could be felt as she and Sweetie embraced. The words the filly said, it brought the older unicorn some solace, knowing that Sweetie did not hate her. She tilted her head and never wanted to stop, a quiet squeak escaping Sweetie Belle.

It took Rarity a moment to process that this was also where they shared their first kiss. The spot where her little sister put all her faith in her as a special somepony after a hokey confession. The older unicorn realized that things probably wouldn't turn out so bad if their relationship lasted this long without much issue.

The two remained in that spot, lips pressed against lips. Two sisters holding each other. Rarity let out a soft moan and sucked on her sister's bottom lip as they parted, a smacking sound heard as their mouths separated from the sudden act.

"Dearie... I do not know how you could tolerate a foolish unicorn like me for so long." Rarity said earnestly, "To have so much faith in me when I didn't for you. And after what I did to you--"

Sweetie gave Rarity another peck on the lips, "It's because you don't mean to do hurtful things to me. You wanted to spend time with me, I can't be mad at you for that. And we did end up having a good day despite everything." she paused for a few moments, looking in between her own legs, "If you think this is how today should end, then I'm ready."

"But--"

"Rarity..." the filly said, "You did it because you love me. I know what you wanted to do. And I know I can trust you not to hurt me. You're not a creep. You never were and will never be." she assured, nuzzling Rarity's neck again.

Rarity bit her lip, but then she gazed into her sister's eyes. She didn't see pity or lust. She saw genuine love in her eyes and heard it in her voice. The voice Rarity loved hearing.

Finally, with a sigh and one more glance at her defeated reflection, Rarity said, "Very well, darling. Wait for me in the bedroom. I have a few things to attend to."

Rarity looked in a mirror, making herself more presentable for Sweetie Belle before she walked into the room. She used her magic to levitate a tissue over her face, wiping away the stains of tears and eyeshadow left on her face. She then applied more of her blue eyeshadow as well as mascara. She exhaled. This was it. No turning back.

She was about to make love to her little sister. The pony she loved most in the world. Rarity had her doubts. But as of tonight, Sweetie put her utmost faith in her that the night would go well, that she knew that nothing could go wrong. If Sweetie held her to such regard, then she felt she couldn't disappoint, especially after being told so many times that everything would be fine.

Looking at her now much cleaner reflection, Rarity said, "Do not fret, Rarity. Sweetie Belle loves you. You wouldn't do anything to harm her physically or mentally. She wished to for this as much as you deeply wanted it. She wants this too." she told herself sternly, a firm scowl seen on her features. She wanted this, she was willing to admit it.

"Rarity! Are you ready?" shouted Sweetie Belle.

Turning her head, the older unicorn gave her mane one last brush before responding, "Coming, Sweetie, dearie!"

Rarity and Sweetie Belle dropped onto the bed on their sides, their mouths open and tongues dancing. Sweetie's sister gave her a half-lidded stare as they continued making out. Rarity giggled and held Sweetie's back, pulling her into a hug and closing whatever distance they had, their lips touching again.

Their muffled giggles were heard as they continued kissing while Rarity hugged her sister over her chest. Another moan was heard as Sweetie licked her sister's lips. Their tongues swirled in each other's mouths, Rarity gently caressing Sweetie's upper lip. The older unicorn could tell her sister was getting used to their kissing.

The two parted, Rarity lying atop Sweetie's body now. A hoof combed the filly's two-toned mane, their wet appendges lightly stroked against one another as they separated. "Are you ready, darling?" Rarity purred to her sister. Sweetie slowly nodded with an assuring smile.

Then, Rarity lowered her head and brushed her lips on Sweetie Belle's stomach before lowering down in between the filly's legs. The filly readied herself and gave her sister a reassuring nod. It was time.

Finally, Rarity stuck her tongue out and Sweetie flinched upon feeling her older sister intrude in her. "W-Woah!" she gasped.

Rarity paused, "I'm sorry, Sweetie. Should I--"

"No!" Sweetie snapped, "That... that felt great!"

Hearing her sister, Rarity stuck her tongue out again and began to circle it around the rim of her sister's vagina. Warm, wet, pulsing, a new and yet so familiar feeling. "You like that, darling?" she wondered.

"Yeah!" Sweetie moaned, her forehooves curled over her chest excitedly. "Yes!"

A giggle was heard and then Rarity continued, her tongue reaching into the filly's pussy more. "Yes!" screamed Sweetie Belle, slamming a hoof down on the bed in excitement, "Rarity!" it was not a squeak of surprise nor of fear. Rarity noticed it as one of pleasure, "I-I'm starting to feel funny!"

"It's normal, dearie!" assured Rarity before going back in, "Just let it it all out. I promise it won't hurt."

"Okay!" squeaked Sweetie Belle.

With that said, the older unicorn intruded her muzzle in her sister some more, a moan. A squeak from the filly, until Rarity finally felt something drip onto her face. "Rarity...?" Sweetie called out to her older sister. "Rarity! I-I don't know what's happening!"

"Sweetums, let me know if you want to stop." eased Rarity before diving her muzzle back into her sister's pussy.

"Ah! No, don't stop!" the filly demanded loudly, Rarity's tongue doing wonders inside her. "Eek!"

Then, Sweetie Belle jolted upward slightly, cumming all over Rarity's face, the older unicorn looking rather pleased at the results. "..." she was silent at what she did.

However, before any questions could be asked, Rarity snapped her head upwards and kissed Sweetie Belle again, caressing a hoof over the filly's chest. "Mm!" the two moaned once they embraced.

The taste of Rarity's lips felt different to the filly. Strange, yet it didn't deter her from deepening it in the slightest. Instead, Sweetie pushed herself upwards and began to press her tongue on the mare's lips. Without hesistation, Rarity allowed her sister access.

The two remained like that for a few moments, tongues reaching into each other's mouths before inching apart slowly, Sweetie giving her sister a half-lidded stare in awe, "Wow..." was all she said.

Rarity smiled, "Did you like it, Sweetie?

"Uh-huh..." moaned the younger unicorn.

"I'm glad to hear that at the very least." Rarity giggled. She sighed inwardly, "I do hope I wasn't too rough with you."

Sweetie Belle shook her head, "You weren't. It felt good..."

"Hm..." Rarity hummed, wondering if she was willing to, "Perhaps you can do the same for me then if you wish." she offered.

"Huh?"

Rarity slowly nodded, "Er, yes. But if you don't feel comfortable with doing it, I won't force you." she eased, whispering into her sister's ear as she said this. She gave Sweetie a soft, quick kiss on the lips.

"I want to." Sweetie responded. "I told you, you wouldn't hurt me. I want to have fun with you too."

Rarity nodded, "If you wish to. Do know I don't want to rush things anymore if you aren't ready-- eep!" she let out a yelp once she realized that her sister was already in between her legs.

"H-Huh?! Sweetie Belle... yes!" shouted Rarity, feeling Sweetie's tongue invade her marehood. "Yes, oh sweet Celestia, yes!"

Sweetie Belle raised herself, "Am I... am I doing it right?"

Rarity nodded, drooping her head on the pillow and she stuck her tongue out, "Oh yes you are, Sweetie." she assured.

"Okay." then she went back in, Rarity found her sister's raised flank enticing right now, but now wasn't the time. One leap in their relationship was enough. She bit her lip, holding back another moan.

"Oh, you're doing wonderful, darling!" said Rarity, stroking the filly's mane. She felt Sweetie's tongue move around her pussy still. "Keep going, Sweetie Belle!"

Sweetie pushed her muzzle in a little more and began to eat out the mare. She knew she was making her sister happy at least. Plus, she was liking this too. She was just following what Rarity did, and based on her reactions, she was doing good.

Then, Rarity's body jolted, Sweetie's tongue hitting a sweet spot, "Ah! Ah yes!" the bed creaked at the sudden movement, "Oh, I'm almost there, Sweetums! Don't stop!"

Without saying anything, Sweetie Belle stroked her tongue around the rim of her sister's vagina to tease her to allow her to cum. "Oh, darling! YES!" screamed the mare at last, "Ahhhh!" it was a moan that escaped her at last.

Then, she began to feel something drip down onto the sheets where there were already stains. She could smell it, it was strange, and yet satisfying to sense. Rarity came on the bed, some of it in the filly's mouth.

The little unicorn sat up, the two sisters panting as Rarity cooed. "Oh, Sweetums... you were wonderful." the filly wiped her mouth, "Thank you... for trusting me... again. It seems you are quite the beautiful mare I dreamed you to become already."

Sweetie blushed, "T-Thank you..." she rested her head on her sister's chest and sighed in content. She yawned, "Do you want to clean?"

"No... I wish to spend the rest of the night with my dear special somepony..." purred Rarity. "This is our long day together after all." she reminded her sister, embracing her sister a little tighter now.

"Okay!" said the filly, perking up now.

Rarity used her magic to tuck the two of them in under the covers a little more. She cupped a hoof beneath Sweetie's chin and lowered her own head, meeting her muzzle with her little's sister's own once more for the night.

Rarity kissed Sweetie Belle, the taste and smell of their sex resonating through their mouths and noses. Yet it didn't matter. What did matter was the two of time, alone, and reminding each other of the strange love and passion they share. It was different than even earlier, a reminder of the big step they took in their relationship.

Sweetie Belle pressed her tongue onto Rarity's lips and circled her wet muscle around her sister's mouth before finally allowed to reach in to play with the mare's own. The filly squeaked once she felt how forceful her sister was playing.

The two rolled around on the bed, with the sisters' hooves wrapped around each other to deepen their kiss. Rarity parted for a second, "You're so beautiful..."

Their tongues danced once more, lips parting slightly so that they could move outside their mouths. Rarity gave her sister a soft gaze, the little unicorn's eyes still closed and entranced in their deep kiss. The gap closed again and they moaned, a quiet giggle escaping the mare, loving how much more direct Sweetie Belle was acting in their kissing sessions as it were.

"Mmm... mwah!"

A smooch sound was heard as Rarity parted her and Sweetie. The mare licked her sister's lips even after they parted, earning a playful laugh from Sweetie Belle, her sister's tongue caressing the outside of her mouth. Another peck on the cheek a second later.

Here they were. The end of the night together ending. Yet, Rarity wanted to spend each waking second with her little sister, her special somepony and showering her with love.

Rarity began to caress her lips on her sister's neck, catching the filly off guard. A yawn came out of Sweetie's mouth. Soft smooches were heard each time Rarity pressed her lips on and separated from the younger unicorn's fur.

When Rarity heard the yawn she repeated the action, sitting up for a moment. "Oh, dear us. Perhaps we should get our beauty sleep." she suggested, wiping an eye.

"Y-Yeah..." Sweetie agreed.

The two lied down again, Rarity holding Sweetie Belle in her hooves. She inhaled and exhaled sharply, "I love you, Sweetie Belle. More than I should, and I do. I never want you to think otherwise."

"I love you too, Rarity!" Sweetie replied.

A soft smile formed on the mare's muzzle, "And do know that if you wish to do this again, let me know. I am aware of your... maturing state after all. I too was a filly, you know."

"Alright..." whispered the filly.

"And remember that this remains between you and me. Do not tell anypony of us nor share what I taught you."

Sweetie rolled her eyes playfully, "I get it."

"Oh, hush."

The two shared one more goodnight kiss, shorter yet passionate. "Mwah." whispered Rarity each time while pecking her sister's cheeks and horn repeatedly lovingly, smacking her lips on Sweetie's once more in surprise.

"Goodnight, darling."

"Goodnight."

And so the two sisters drifted off into slumber after a surprisingly long and enjoyable night. Their secret bond deeper than before. Despite keeping it to themselves, Rarity and Sweetie knew they loved each other and wouldn't change their relationship for the world.

And Rarity recognized her sister as a maturing mare after tonight.