>Day Logical loopholes are bullshit in Equestria.
>You stare up at the sky as the moon starts to rise, being dragged by one of the most beautiful mares you've ever seen.
>Princess Luna was more than just beautiful though.
>Cute, strong, incredibly cunning, kind, and she had one of the most adorable laughs you've ever heard.
>It's too bad she's royalty or you might have had a chance with her.
>”What're you staring at Mr. Anon?”
>The little foals voice catches you off guard, causing you to fall backwards off your fence and into the grass.
“Sweetie! What are you doing here? Where's your sister?”
>Sweetie Belle walks to your side, biting the cuff of your shirt to help you up.
>She is sporting a saddlebag for some reason.
>”Don't tell me you really forgot...”
“Forgot what?”
>The filly stomps the ground, pouting as she looks up at you.
>”You promised to help me practice my magic today!”
“That was today?”
>”Uh huh! You said to meet you at the park at noon, but you never showed!”
>Oh crap, she's right.
>You were very busy today and completely forgot your promise.
“I'm sorry Sweetie Belle. Can we try again tomorrow?”
>”We can practice now. I asked my mom and dad and they said it would be a great idea! They even said I could sleep over if you let me.”
>Something smells like bull shit.
“So if I were to talk with Rarity or your parents right now, she'd say you have permission to spend the night with a grown man who they barely know?”
>Sweetie nods, smiling from cheek to cheek.
“... All right, come on.”
>You wave the Unicorn foal in as you go to make a phone call.
 
 
“But Rari-”
>”No buts Anonymous! You made a promise and did not uphold it! My parents understand the dilemma Sweetie Belle is in and refuse to let you off the hook so easily. Now, I will be there in the morning to collect my sister and I expect to see leagues of improvement in her skill. Ciao darling.”
>*click*
“Rarity?...”
>*Beep beep beep*
>She hung up on you.
>Placing the phone back on it's base, you bring a hand to your face and sigh.
>That call confirmed the filly's story.
>Sweetie is looking up at you, eyes sparkling like pure cut diamonds.
>”Well?”
>You lower your hand and stare at the filly as she hops a bit.
“This won't be a sleepover. We're going to study all night, got it?”
>Her smile shrinks a bit, but she nods and drops her saddle bag on your couch.
>”Okay, so what should we start with?”
“Where do you need the most improvement?”
>She looks up at you, confused.
>”What do you mean Mr.Anon?”
“What are you struggling with the most?”
>”Ummm... I can't do any of the higher stuff like Twilight and Rarity can. Should we start there?”
>If she can do more advanced stuff, she should be able to catch up quickly on the more simple spells.
“Sounds good, let me grab a reference book real quick.”
>In truth, you didn't know much about the practice of magic, only the study of it from books Twilight let you borrow.
>As you turn to your bookshelf, you hear Sweetie Belle let out a soft sigh.
>Turning back, her eyes look half lidded and she is laying her head on one hoof.
“You okay Sweetie? You look tired.”
>”Huh? O-Oh! I'm okay! Just... happy.”
“Happy?”
>Her tired-like expression changes to one of full awareness.
>”U-Uh, happy you can help me! I've been having a reaaaally tough time and everyone else has been too busy to help.”
>Including you.
>Didn't stop her from having you make time for it.
>Still, it's your own fault for breaking the promise you made.
“Well, we'll change that tonight, won't we?”
>She nods as you grab a book focused on advance kinetic spells.
“All right, let's see if we can't pull one of these off.”
>Sweetie stands up, walking next to you as you open the book.
 
 
>”Over there Mr. Anon!”
>Swinging the extinguisher's hose to the direction Sweetie is pointing at, you blast the flames until they are smothered with foam.
“Jesus, look what you did!”
>”I'm sorry I'm sorry!”
>The filly cover her head, eyes watering up.
>You chuckle and pet her, causing her to let out a confused whimper.
“Sweetie, you were able to shoot flames out of your horn! According to the book, you're on level with a young mare in university.”
>”Really?!”
>Her eyes are sparkling again, she is hyperventilating a bit.
“Mhmm! You sure you were struggling at all? I don't think I've even seen Rarity do something that... that amazing!”
>Your praise causes the kid to blush, rubbing her head against your leg.
>”It's all thanks to you. No one ever lets me practice like this!”
>With good reason.
>After all the spells you two practiced, your house looks like a tornado just ran through it.
>Twice.
“Hmm, have your parents ever thought about looking into a scholarship for you? Twilight said something about her getting into Canterlot U's young pony program when she was about your age.”
>The smile on Sweetie Belle's face disappears.
>”B-But if I got into the program, I would have to move away from everyone!”
“It would be a good opportunity for you though. You have a gift Sweetie.”
>Her lips is trembling, she looks as if she is about to cry.
>”T-That's only with kinetic stuff! I can't do transformation or illusion spells at all!”
>Sighing, you grab a book on alteration and transformation.
“Let's see if we can't fix that. Pick a spell and try it out.”
>The filly whimpers, scanning over the pages.
>Her whimpering and sorrow filled expression both stop as she eyes a line on a page.
>She takes a deep breath as her horn starts to glow.
>A blinding light fills the room, causing you to avert your vision.
>As your gaze returns, a sight that leaves your speechless is presented to you.
>There is a full grown Unicorn mare standing in you living room.
>Curled, bouncy light pink and faded purple mane.
>A stunning -dirty- white coat.
>A figure reminiscent of Rarity's and eyes that shine in such a majestic way.
>She notices you staring, causing the both of you to blush.
“S-Sweetie Belle?”
>The mare coughs once, her voice is deeper but not unladylike.
>”Y-Yes Mr... Anon?”
“Oh my... what did you do?”
>”I pulled off a temporary aging spell. C-Can't get into the young pony program if I am a full grown mare, right?”
“Sweetie, you just said it's temporary.”
>”... Darn, why did I think this would work?”
>She looks somewhat annoyed with herself, staring at a spot in the rug next to your feet.
>”Huh... I feel different Anon. Very different.”
“What do you mean?”
>The adult Sweetie looks up at you, a confident smile upon her lips.
>”Well, I feel wiser, more cunning. Like I could pull off more than just some advanced spells. Also... u-uhhh, I-I feel a bit more confident with myself. I-I mean, I made your jaw drop, right?”
>Is she... did you make an eight year old filly feel sexy?
“Sweetie, you're eight. You shouldn't have any confidence problem.”
>”That's the thing Anon. I don't FEEL eight... I feel, adult. VERY adult.”
>She steps towards you, biting her lip.
“Sweetie, what are you doing?”
>”Don't act coy Anon, I know that you know that I like you.”
“I know you have a CRUSH on me. So do Applebloom and Silver Spoon.”
>Sweetie Belle  frowns a bit, eyes stern.
>”Anon, I remember what it's like to have a crush. Trust me, what I have now is no crush.”
>She places her hoof on your crotch.
>You smack it away and step back.
“Sweetie, stop! You may think you're a mare, but you're still just a filly.”
>”Anon, please, don't be like this.”
“Be like what? Not wanting to fiddle a filly?”
>She growls a bit, going back to the book.
>”I'm not a filly right now! I'll show you.”
>Her eyes dart over the pages as her horn starts to glow.
>You sigh and step toward your filly friend.
“Sweetie, I'm s-”
>A blast hits you square in the stomach, sending you flying back.
 
 
>”Wake up little Anon~”
>Sweetie lays a peck on your cheek, causing you to stir awake.
>She seems to have grown more.
>Maybe even taller than you now.
“S-Sweetie?”
>You cover your mouth.
>Did that voice come from you?
“Wh-What did you do?”
>Your voice is higher, fingers smaller.
>”I used the opposing spell, to the one I used on myself, on you. Well? Don't you feel younger?”
“No! I still feel like a big kid! … I mean an adult!”
>Why did you just say big kid?
>Trying to focus on a possible answer, you can't concentrate as well as you could just moments before.
>”Aww, you're so cute Anon! Come here.”
>The mare pulls you close, locking her lips with yours.
>It feels weird, good, kinda fuzzy.
>She lets go and whispers.
>”Tell me Anon, when was your first kiss?”
>Looking up into Sweetie's eyes as she stares into yours, it feels as if she is holding you in place with her eyes.
>After a moment, you manage to stutter an answer out.
“W-When I was a teenager, high school.”
>She giggles, kissing you again.
>”Aw, so I just took your first kiss then?”
“What? Nuh uh! You can take something that's already happened!”
>The mare giggles, pushing you on your back.
>”But Anon, it hadn't happened. I'd say you're no older than ten now. Logically, I just took your first kiss~”
>Her horn glows, magic wrapping around your clothes.
>They start to come off until you are naked, covering your crotch.
“S-Sweetie Belle stop!”
>”Shhh, don't worry Anon, I won't hurt you. I just want something special from you. Let big sis take care of you.”
>Her hoof continues to hold your child sized body as she kisses down your chest.
>She smiles as her face is now in front of your yet to develop boy part.
>”It's sooo cute, I can't wait to see it again when it's finished growing. For now... enjoy~”
>Her tongue runs over your penis, causing you to shiver.
>It's so sensitive now.
>Could you really have gone back to when you were just a kid?
>I-Is this your first time for everything?
>Sweetie kisses the tip before lowering her mouth on your rising shaft.
>She closes her eyes as she fits the whole thing in her mouth with ease, tongue running over it as she moans.
>You let out a forced yelp mixed with a moan.
>The child mare opens her eyes, locking them with yours as she starts to bob her head.
“Sw-Sweetie, please stop!”
>”Why Anon?~ You aren't filly fiddling and when the spell wears off, I won't be a colt cuddler. It's perfect, we can both do this with no negative repercussions.”
>You don't want to admit it, but you think she's right.
>This feels so good too...
>She sees the resignation in your expression and pulls her head off, coming up to kiss you.
>”Sooo cute! Stop being this cute or I'll have to do this every night.”
>She rubs her nose against yours as she grinds her marehood against your erection.
>You hate how she's talking down to you as if you were an actual kid, but what can you do?
>She's taller, stronger, and she has magic.
>Right now, Sweetie is in control.
>The mare is well aware of this, pushing her hips down to steal your renewed virginity.
>”Mmm, I don't get why sis's magazines said this would hurt. This feels nice and comfy~”
>She rocks her hips up and down, opening your mouth to push her tongue against yours.
>The pleasure you are getting form this is unreal!
>Why haven't you cum yet?
>... She really did turn you into a kid.
>Your body hasn't developed enough to ejaculate.
>And if you're a kid, she's a real mare right now.
>”Ooooh Anon, do you like when big sis Sweetie does this?”
>Her hooves are against your chest as she bounces against your body.
>Whimpering, you nod as she giggles more.
>She gets off you, turning around so her ass is the only thing you can see as she lowers herself back onto you dick.
>It's so big and jiggly.
>So sexy... hypnotic.
>Your eyes focus on the way it bounces and grinds, how it shakes and jumps.
>God, if Sweetie Belle will really turn out like this...
>Maybe it wouldn't be so bad letting her do this more.
>The mare screams out, hips pressed down against your crotch.
>Something hot and wet splashes against your skin.
>”O-Ooooh, so that's what an orgasm feels like. H-Hee, no wonder Rarity likes stallions so much!”
>Her break soon ends, she is back to pushing her marehood down on your dick.
>She's treating you like a toy, using your body to satisfy her.
>It soon becomes to much for you.
>The mares rough riding does something you didn't think possible.
>She forces a VERY premature orgasm from you.
>”Oooh! Anon, did you just cum inside me? Naughty boy~”
>She gets off again, laying on her back.
>”If you can finish like a man, maybe you should fuck me like a man~”
>Where did she learn this language from?
>Did it happen when she became a mare?
>Before you can continue wondering about the situation, your age progressed lover starts to wiggle her ass underneath her.
>You whimper and walk towards her, penetrating her freshly cream-pied pussy.
>”Good boy, make big sis happy~”
>She kisses you, holding you close.
>The rest of the evening is spent like this, with Sweetie Belle experimenting with your human boy body.
 
 
>Day Sex didn't happen in Equestria.
>A strange sensation is rushing over your body.
>You groan as you wake up.
>Looking down, your body has returned to normal.
>There are no signs of you having sex either.
>No cum, no sweat, nothing.
>A quick glance at Sweetie Belle shows that she is in the same situation.
>Her body is back to that of a filly.
>Clean coat and virginity intact.
>The rest of the room however...
>The floors are stained with your juices and the blood from when you finally popped adult Sweetie Belle's cherry trying doggy style.
>Sighing, you shake the filly.
“Sweetie Belle... wake up.”
>The adorable colt cuddler stirs awake, letting out a cute yawn.
>”M-Morning Anon... M-Mr. Anon... a-are you mad at me?”
>Shaking your head, you lift her up and carry her to the bathroom.
“No. I just want to know why you did what you did.”
>She whimpers, hooves pressed against your bare chest.
>”I-I didn't want to leave Ponyville and you. When I saw that spell, I thought that if I became a mare they couldn't accept me into the foal thingy. Then you brought up the fact the spell was temporary. I tried thinking of a new plan and I started to think more...”
“Cunningly?”
>”Yeah. I thought that if I could get you to like me as a mare, you wouldn't want me to go so you wouldn't tell anypony. Then this weird feeling came... I-I started to remember what my sister's magazines said about getting stallions to like you.”
>You lower the filly, turning on the bath to clean her up before the sun rises.
“You mentioned her having magazines earlier. What magazines were those?”
>Sweetie Belle blushes, getting into the tub.
>”They had pictures of mare and stallions wrestling... I guess it wasn't wrestling, was it?”
“No Sweetie Belle, it wasn't.”
>Pouring some water onto her coat, you start to lather soap against her.
>”Well, when I thought of the pictures, I thought of us doing what they did and it got me really REALLY hot. I started to get this tingle... down there.”
“Yeah, that'll happen when you get to be an adult.”
>The filly whimpers as you rub all over her body, save for the obvious -nope- zones.
>”After you said no, I thought that you wouldn't be able to say no as a kid. So... I ...”
>Before she can finish, you pour some water over her head, rinsing her off.
“I know. Sweetie Belle, what you did was wrong. You turned me into a child then used me.”
>She starts to tear up, looking at you with remorse filled eyes.
>After a quick sniffle, she manages to squeak out.
>”I'm sorry.”
>You pull the filly out in a towel and hug her.
“It's okay. I forgive you... but you have to promise me some things.”
>”Anything Mr. Anon!”
>She is looking you dead in the eyes.
“First, you are NEVER to do either of those spells without my permission ever again. Okay?”
>”Okay...”
“Second, we are going to tell your parents about your gift. Even if you do go to Canterlot, you'll come back soon enough for vacations and when you finish. Right?”
>Sweetie sniffles again before answering.
>”O-Okay...”
“Last... The next time we do it, we're going to be the same age, got it?”
>She looks up at you, shocked.
>”Wh-What?”
>She may have used you, but you do want to get to know the mare Sweetie Belle has inside her.
>Despite not talking to her much, you felt a familiarity in her.
>One reminiscent of a certain princess of the moon.
“Next time we have sex. We will both be adults, okay?”
>She nods, smiling.
>”So does this mean you like me?”
“It means I am interested, okay Sweetie?”
>The filly doesn't understand the difference now, but the next time you see Sweetie mare, she will.
 
 
>Day first vacation day in Equestria.
>”Anon... it's been too long.”
>An aged Sweetie Belle stands before you, eyes soft and cheeks rosy.
“Hey Sweetie Belle... I-yeah.”
>She gulps then trots next to you, eyes locked with yours.
>”I hope I didn't give you too much trouble as a filly.”
“You'll be a filly again soon enough... but no, you didn't.”
>She was in tears when she said good bye to you four months ago, but you knew she would be back soon enough.
>”Still... I missed you.”
>This was awkward, but felt somewhat right as well.
“I know... even if you did hold me down and take a lot of my firsts.”
>The mare has a smug smile on.
>”So you recognize that I gave you a lot of second chances then?”
“Yeah, it took some time, but I did. Now, I believe you have some firsts I can take myself.”
>Sweetie nods, climbing on your bed, staring at you as you undress.
>”We're not going to just be rut buddies, are we?”
>You kiss the mare, holding her hoof in your hand.
“No, I just want some revenge for last time. Then... maybe we could go out on a date somewhere you won't be recognized?”
>She punches your shoulder, smiling.
>”Afraid to be seen dating an eight year old?”
“Hey, I don't want to go to jail.”
>”Me either... so, are we doing this then?”
>She lays on her back, legs crossed, head turned to the side, hooves covering her chest.
“Yeah, we are.”
>Pulling yourself up to her lips, you kiss them as your hand runs between her legs.
>For the first time in four months, you're going to be
>Fucking Sweetie mare.