It was a bright day outside today, if the sun was any indication Celestia must be in a good mood this morning. It was either that or Celestia must have had the opportunity to grab some cake this morning. I remember how much of a panic Shining and the royal guard was in when some-pony had stolen from Celestia’s private stash, she had them doing drills on and off for a week.

“C’mon Dusk focus.” I muttered to myself, “You got to find out what you can about this Twilight Sparkle.”

I asked every-pony I could, but all the information I got was how much of a hottie she was from every stallion I asked. The mare’s I asked weren’t so helpful either, one or two even gave me a funny look. I asked them why but they just said I reminded them of someone else.

The only things I could find out about her was that she was a flirty, curvy, lavender unicorn that seemed to thrive in being the centre of every-ponies attention. I sighed and took a seat on a nearby bench, this was getting me nowhere.

“U-um g-good morning Dusk.” a soft spoken shy voice greeted, “A-are you alright?” I looked up, and was greeted by Fluttershy. She was the only pony shyer than I was, but don’t let that fool you that stare of hers was infamous in these parts. She stood taller than I was, and was easily the curviest of my friends.

“G-good morning Fluttershy.” I stuttered, despite how much we’ve been through together I still stutter around her. “I-I’m...kinda stressed at the moment.” Her kind eyes held a hint of concern.

“W-what’s wrong?” She asked, “I-if you don’t mind telling me that is.”

“...” I sighed, “Do I look any different to you?”

“U-um...I don’t think so.” Fluttershy answered wondering what I was going on about. “M-maybe a little smaller?” She took a closer look, “H-have you let Rarity do something with your mane?”

“...P-please don’t mention her.” I looked away, “S-something happened...between us.” I hesitated to say anything further, “I-I rather not t-talk about it.”

“D-Dusk?” Fluttershy looked concerned, “W-what happened?” I mumbled something under my breath, I’m not sure Fluttershy’s heard me.

“She caught you crossdressing and tried to seduce you?” She repeated to herself in a hushed tone. I just nodded in confirmation.

“Spike says I’ve been acting strange lately.” I continued, “I’ve been having these random black outs the past few days, and I’ve been acting out on things I normally wouldn’t.”

“H-how so Dusk?” she asked timidly.

“Spike says I’ve been acting more and more like a mare lately.” I replied, while brushing some or my mane out of my eyes. “I-I mean...c-crossdressing really? I-I’ve been curious about it before but...”

“...o-oh my...” Fluttershy squeaked out, I cringed at my admission.

“N-not only that...AJ thinks I’ve been checking out her older brother.” I said solemnly. “I-I mean really me and Mac together like that?” I joked, “Could you picture something like that Fluttershy?”

“U-um...o-oh w-wow...” Fluttershy’s blush seemed to get redder by the moment, “I-I d-don’t t-think that w-would be a bad t-thing...I-I mean...i-if that’s w-who y-you like D-Dusk...I-I mean...O-oh...my...” I just stared at the now crimson red pony beside me in disbelief.

“Flutterhy?” I asked now getting a blush of my own, “A-are you picturing me and Mac together like that?”

“Eep!” Fluttershy panicked, “I-I wasn’t picturing y-you getting r-rutted by M-Macintosh, a-and having h-hot and k-kinky sex!” I groaned and rubbed my temples, it was always the shy and quiet ones that surprise you the most.

“Really Fluttershy?” I asked blushing, “...N-never mind I don’t want to know.” I suppose I’ll ask no harm done right? “Do you know anything about Twilight Sparkle?”

“I-I think I’ve seen her at the market once or twice this week.” Fluttershy answered snapping herself out of her fantasy, “S-She’s been the talk of the town lately, I-I heard she was at the Ice-9 the other night. Apparently she seduced a mare called Moonlight Rising, but she ran off she seemed to be in a hurry about something.”

“D-did you say M-Moonlight Rising?” I asked in shock, sweat dripping down my neck. Fluttershy nodded in confirmation. “O-Oh no...”

“W-what’s wrong D-Dusk?” Fluttershy asked confused.

“T-that’s the...” I stuttered, “T-that’s the n-name Luna u-uses w-when...w-when she sneaks out without C-Celestia knowing.”

This wasn’t good in the slightest, whoever this Twilight was had gotten her hands on Luna. Something however tells me she doubted she knew about it, I mean I’ve heard the name mentioned once or twice before but I’ve always ignored it as it was always such a minor detail.

“I’m such an idiot!” I cursed under my breath, “Celestia’s going to be pissed when she finds out about this.”

“W-why would she be so angry?” Fluttershy asked curious.

“She’s very over protective of Luna.” I explained, “She has been ever since she returned to normal. You should have seen her when she found out I had a crush on Luna.”

“T-that bad?” Fluttershy inquired.

“...Put it this way Fluttershy, I wouldn’t want to be Twilight when Celestia gets her hands on her,” I shuddered at the thought.

“C’mon Dusk it can’t be that bad?” A very familiar voice spoke up making me jump. I turned around to the source of the voice only to find my older brother Shining Armour.

“S-Shining?” I stuttered, what was my big brother doing here? Shouldn’t he be in the Crystal Empire with Cadance. “W-what are you doing here?”

“Well Cadie is here to sort out a trading treaty with Princess Celestia, and she told me you were having a few problems.” Shining explained, “She’s told me about this issue with this Twilight Sparkle and asked me to lend a hand while I’m here.”

“I could use the extra help,” I sighed in relief, “The only thing I can find out about her is what every-pony thinks of her backside.” Shining took a seat beside Fluttershy and myself.

“I’m sure we can think of something.” He said ruffling my mane a bit. “Say bro have you gotten shorter?”

“...” I stared blankly at my older brother, “I take it the princess hasn’t told you yet.”

“What about that little project of yours?” He asked, “Yeah I heard, Celestia is worried about you. Hell I am, she told me about these black outs of yours.”

“How’d you find out where I was?” I asked.

“Spike told me, I came looking as soon as I heard something was wrong.” He explained, “Celestia didn’t say why but she asked me to keep an eye on you for couple of days. She asked me to tell you the Twilight Sparkle issue is already taken care of.”

“I would have thought Celestia would be angrier considering this Twilight has molested Luna.” Shining gave me a skeptical look as if he knew something I didn’t. “Do you have any idea how pissed she was when she found out I had a crush on Luna?”

“If anything she just sighed, and told me that she just wanted to have a heart to heart with this Twilight Sparkle.” Shining explained, “She’s been keeping a very close eye on her apparently, apparently she’s figured out who she is but she’s refusing to say who.”

“She’s someone else?” I asked, “No wonder no one can seem to find her.”

“Celestia seems to think some form of magic is involved.” Shining continued, “I mean shape shifting magic isn’t uncommon, but from what I understand this seems to be a permanent side effect of a spell gone wrong. I doubt whoever this Twilight Sparkle really is even aware of it.”

“I-I feel so sorry for them.” Fluttershy added, “C-changing like that against their will, a-and not even realising it.”

“Well...” I theorised, “They would still be the same person personality wise, but there would be a few obvious differences. You know, a few subtle things that would throw people off their true identity.” I got up and paced back and forth for a bit thinking.

“Something on your mind bro?” Shining asked recognising an old habit of mine.

“Well, the person responsible is obviously a magic user with extensive knowledge of shape shifting magic and enchanting. If this was a permanent side effect of a spell gone wrong.” I explained, “So whoever this Twilight is, was either attempting a spell far beyond their capability to cast, or something went wrong during the casting.”

“R-really?” Fluttershy inquired, “S-so what happened is an a-accident right?” I nodded.

“Yeah, a overload of magic would do the trick.” I continued, “Whoever Twilight was would have to be at the centre of the overload to be affected like they are.”

“It’s one of the main reasons you don’t just pick up an enchanted artefact.” Shining Armour added, “We have protocol in the royal guard just for objects of that nature. Ponies tend to either have an addiction of sorts towards whatever the enchant is or just go mad with whatever power it grants them.”

“A-an addiction?” Fluttershy wondered, “H-how bad can this addiction be?”

“Well it ranges from a mild pleasurable tingling feeling, to a more sexual pleasure that renders them drunk off of it.” I explained to Fluttershy, “If they don’t get whatever the addiction is after a while they start to feel empty from withdrawal which makes the feeling they get the next time they feed that addiction more potent. It quickly goes from a craving to a need.”

“O-oh my...” Fluttershy gasped.

“Usually this a temporary thing.” Shining interrupted, “But there are cases of more permanent addictions. Some ponies are more easily affected than others, Dusk here for example is one such case.” Fluttershy turned to me in shock wondering what my older brother had meant.

“S-Shining I-I thought we agreed to never talk about that again!” I shouted in embarrassment.

“Well it’s true.” Shining replied with a raised brow, “Remember when the princess had to explain the magic overload to Mom when we younger?” I kept my mouth shut...that wasn’t one of my finer moments in the past. “You still burst into flames when you get riled up enough?”

“...” I facepalmed, “Those...were not my finest moments.”

“It took months for you to control the resist the urge of bursting into flames when you didn’t get your way as a little colt.” Shining laughed, “Then again I heard Mom was just as bad.” Flutterhy let out a small giggle.

“I-I wasn’t that bad!” I tried to defend myself.

“Dusk when you calmed down from your fits of pyromania you get all giggly like a happy drunk.” Shining deadpanned.

“Four words Shining.” I stated flatly, “Pinkie Pie and no cake.” The second I said those words Shining began sweating profusely, he had far off look in his eyes quite possibly remembering whatever horrors Celestia put him and the Royal Guards through as a result of Pinkie Pie finding and devouring Celestia’s private cake stash.

“Never. Mention. That. Again.” Shining shot me an unamused look, “I don’t want to be reminded of what Celestia dubs ‘Code Pink’ ever again.”

“Shall we get back to the Library then?” I asked, “I’m sure Spike would like to see you and you and Cadance are welcome to stay.”

“Actually I was going to ask, Celestia insisted I’d stay with you for a couple of days just make sure you’re doing alright.” Shining added, rubbing the back of his head sheepishly.

“W-well I take it Cadance is staying as well?” I asked, I didn’t have a problem with her staying and it wasn’t like I didn’t have the room. There was a guest room after all.

“Well of course Dusk, we are a married couple after all.” Shining gave me a concerned look, “Are you hiding something?”

“N-no, nothing at all!” I blurted out with a crimson blush. I didn’t want Shining to see all those clothes in my room. Shining narrowed his eyes at me, but said nothing. “S-Shall we head back to the library now?”

One the way back through the town, Shining was giving me the occasional glance and to be honest it felt like he was trying to figure something out.

“You okay Dusk?” Shining asked, “You look a little out of it.”

“H-huh...y-yeah I’m fine.” I was starting to feel something warm inside me. I felt kind of empty at the moment, like I was craving something but I had no idea what. I glanced over at my reflection in the windows of the stores and houses we passed by, I couldn’t help but notice how feminine I looked. I silently wondered what my big brother would think if he saw my body now.

“Dusk, what’s wrong?” Shining asked concerned.

“I-I’m scared Shining.” I admitted quietly, “I don’t know why but I am.”

“Well don’t you worry Dusk.” Shining ruffled my mane with a reassuring smile, “Your BBBFF is always going to have your back, I mean what kind of big brother would I be if I didn’t?”

“I still can’t believe you still call yourself that.” I giggled, when I stopped Shining gave me a funny look. “W-what?”

“Nothing...I’ve just never heard you laugh like that before.” Shining answered.

“U-um maybe this was what Spike was going on about.” I added embarrassed. Did I really just giggle? Oh by the stars I did didn’t I.
There was that craving again, why did I feel so empty? Where was this want and need coming from. I shook my head out of those thoughts, now isn’t the time Dusk.

We finally got back home, I yelled for Spike but I figured he’d be off helping Rarity at the boutique right now. I sighed, I’m going to have to do something about what happened between us.

“Spike must be a Rarity’s right now...” I muttered half heartedly, “He’ll be gone for a few more hours if I’m right.”

“No worries then.” Shining commented, “Cadance is going to be at the castle for sometime, so she’ll probably teleport in later tonight.”

“Catching up with Celestia right?” Shining nodded, “I figured as much.”

“Letters are one thing Dusk, but you can’t beat talking to someone face to face.” Shining stated, “Since we’re alone...” his face turned serious, “What the hell were you thinking with creating a spell of your own Dusk without consulting Celestia first?”

“I-I...” I wasn’t expecting this, but then again he was captain of the Royal Guard, “I-I...thought...I-I’m s-sorry.”

“Look Dusk, I’m not angry.” Shining explained putting his hands on my shoulders, “I just don’t want you to get hurt okay. Creating a spell is dangerous if it goes wrong, I’ve seen it plenty of times during my time in the Royal Guard.”

There was a flash of heat washing over my body. I needed to focus and did my best to ignore and push down the feeling.

“Dusk are you feeling okay?” Shining put his hand on my forehead, “You’re burning up!” I nodded my head, trying to fight this warm tingling heat.

“I-I’m fine...” I reassured my older brother, “I-I’m just tired that’s all.” This heat was getting unbearable, why did I just want to give into it? Why did it feel so good? “I-I’m going to get myself to bed...maybe an early night will do me some good.”

“Here let me help you up.” Shining offered.

“N-no!!” I shouted, “I-I mean...” Shining ignored me and picked me up bridal style and took me upstairs. “P-put me down Shining!”

I tried to suppress the feeling even further, I know it was just adding fuel to the fire but I had to fight it whatever this wonderful heat was. I didn’t need it I swear.

Shining opened the door, and went inside my room only to be greeted by the sight of various dresses, skirts and lingerie and quite possibly a room fit for a princess.

“Erm...You want to explain this Dusk?” He asked me with a raised brow.

“I-I can’t...!” I panted. I could feel my heart racing and my breathing become heavier. I can’t fight this wonderful heat, I knew I had to but at the same time I just wanted to be consumed by it, “...I can’t help it!” Shining noticed my expression and I was trying to struggle free from his grip.

“Dusk?” I broke free from his grip and fell on top of my bed, “Dusk speak to me what’s wrong?!”

“T-There’s this heat building up inside me!” I explained trying to fight whatever feeling was taking hold, “I-I’m trying to...oooh fuck...f-fight it! W-what’s happening to me?”

“Dusk keep fighting whatever this is!” Shining urged, “Damn it! Snap out of it Dusk!”

The heat, that wonderful addicting heat...the way it was licking and teasing my body I’ve missed this feeling, I’ve craved it, I needed it. My breathing was getting heavier with each wave of absolute bliss.

“S-Shining...I-I can’t...it feels so good...why? Why does it feel so good?” I moaned in pleasure as another wave pulsed throughout my body. I could feel my stallionhood regressing, shrinking into my body and changing.

Shining could feel a familiar pulse of magic suddenly flash downstairs. He silently thanked the stars for his wives sudden arrival.

“Cadance!” Shining shouted in a panic, “Get up here now! We’ve got a problem!” Shining could hear hoof steps running up the stairs in a panic, and soon enough Cadance came rushing into the room.

She was greeted by the sight of Dusk going through something with Shining trying to get his younger brother to snap out of whatever was happening to him.

“Cadance can you tell me what’s wrong with Dusk!!” Shining pleaded to his wife, “C’mon bro stay with us!” Cadance nodded and tried a spell to see if she could find out what was going on.

“By the sun!” She exclaimed, “He’s overloaded with lust and desire!” Shining just looked at his wife in confusion.

“What do you mean overloaded?” He asked in a panic. I let out a low moan as I could feel my clothes getting tighter around my chest and hips. I could feel a familiar spark coming from Cadance’s magic, whatever she scanned me with had kicked the feeling into overdrive.

I never felt so moist between my legs, and I could feel a hand slip between my jean covered legs. That wonderful addicting feeling went from a fire to a raging inferno. It was overwhelming me and I wanted more of it.

“Dusk, please snap out of this!” Cadance urged, “We can help just please tell us what’s going on.” I gave no response, other than increasingly feminine blissful moan. I could feel my chest beginning to fill out, each little bit of growth sending me further closer to the edge.

“Uh...Cadance?” Shining pointed at my chest as he watch on as it grew. My hips and ass began to fill out even more, getting bigger and fuller, wider and curvier.

“Oh my...Dusk what’s happening to you!?” Cadance yelled in shock when she noticed my shirt was straining under my growing bust.

“...I-I...H-haaah...c-can’t help it!” I groaned, “...Oh fuckfuckfuck!...I just feel so...good!” My thighs thickened, my massive breasts began to pop the buttons of my shirt revealing a rather large amount of cleavage. I wanted more of this addicting feeling...I craved it.

Both Cadance and Shining watched on in shock and disbelief. Shining noticed how big his younger brother’s hips were getting as they began to tear Dusk’s jeans at the seams. They watched on as Dusk’s mane got longer, his facial features getting softer and his lips getting fuller.

Whatever was happening to Dusk was having an effect on Cadance as she was trying her best to ignore the heat between her own legs. Cadance could feel the pure sexual desire radiating of her brother-in-law, she may specialise in love magic but that also meant she was very sensitive to feelings to desire and lust. Small everyday feelings didn’t do anything to her but in pure concentrated bursts like this was intoxicating to her.

“Umnph...O-oh no...” Cadance let out a quiet moan, “S-Shining...” Shining turned to his wife and noticed her distress. “Whatever is...oh fuck...is affecting me too...this desire...it’s intoxicating.”

There was a ripping sound as my jeans finally gave way under the strain. I looked at Cadance with a pleading look, she looked back my way with a look of restraint on her face.

“F-fuck me...please...” I pleaded, I sounded so vulnerable, “I-I want more....p-please I-I need it...”

“Damn it Dusk!” Shining shouted pinning me underneath him, “Fight this man!” I glared at him, and tried to break free of his strong grip. “Dusk stop it!”

“H-hah!!” Shining glanced over in his wife’s direction, only to see her on her knee rubbing and teasing her soaking wet pussy while caressing and groping her large breasts through her dress, “A-ahnn....S-Shining...I can’t...I-I c-can’t...help it!!!”

“Damn it not no-mmph!?” Shining was cut off by a teasing kiss, “D-Dusk?”

“Mmm are you going to punish me?” I asked with a flirty tone, “Have I been a bad filly? Does your little baby sister need to be disciplined?” My older brother stumbled off and gave me a horrified look.

“D-Dusk?” Shining stuttered, “W-what’s gotten over you?”

“Mmm never mind then...” I groaned as I stripped off whatever clothes I had left, “Shame really, Cadie over there seems to like the idea of you rutting your naughty little sister.”

“Dusk...” Shining couldn’t help but watch as I stretched and moaned. I grinned I made sure he could see every inch of my naked body.

“Do you like what you see?” I teased, walking over to Cadance, “Shall I be a good filly and give Cadie some relief?” I began to nip and kiss at Cadance’s neck, and slip my fingers inside her soaking wet pussy while she teased and rubbed her clit. “It’s not incest if it’s a threesome after all.” Shining just shot me a glare.

“I’m not going to fuck my younger brother!” Shining growled as he grabbed and threw me back on the bed, “Just what the hell has gotten into you Dusk!?” He stood in between Cadance and myself daring me to get past him.

“Well aren’t you a spoil sport.” I pouted, “Geez you’re more uptight than Celestia right now.”

“I want answers now!” Shining demanded going into full captain of the guard mode. I had to give Celestia credit she trains her guards well.

“Alright fine...” I glared, “I’ll play along for now, I don’t like being left all hot and horny...but I guess this is important.”

“What’s gotten into you Dusk?” Shining demanded.

“Aside from jumping the gender gap and getting a hell of a lot sexier?” I asked, “I don’t really know to be honest, this has been happening the past couple of days on and off. I’ll change back eventually but I doubt I’ll remember any of this.” I caught a glance of myself in the mirror, “Not that this is a bad thing, of course.”

“Not a bad thing?” Shining growled, “You just tried to molest my wife to get me to fuck you!”

“I can’t help I’ve got a hell of a sex drive Shining.” I countered, “I haven’t had any in the past day or two.” My expression darkened, “That reminds me I really do need to return the favour to a certain somepony.”

“You’re not going anywhere Dusk!” Shining glared at me, “How can you be so nonchalant about all this?”

“Because this is going to keep happening again and again as long as I live Shining.” I explained, “Whatever is happening is permanent, you can blame whatever happened to me a few days a go for this.” I sighed I was getting sick of explaining this, “I don’t know how but it just did.”

“Great...” Shining rubbed his temples, he turned to Cadance who had finally calmed down and covered herself out of embarrassment.

“To be fair what happened to her was new.” I stated, “I guess whatever happened just overwhelmed her, you know how sensitive she is to her own element.”

“Dusk...” Shining spoke up, “Celestia needs to know about this. It’s too serious not to tell her.” I sighed, I guess the game was up then as much as I hated to admit it.

“...” I just stared at my older brother, “She’s going to be pissed Shining.”

“What why?” he demanded.

“I’m the mare she’s after.” I explained, “The mare who tried to seduce her younger sister...”

“But that means...” Cadance finally spoke up. I nodded in confirmation.

“I’m not a bad mare.” I started, “I don’t want power, or to hurt anypony. I don’t have it in me to be like that...I just want to be happy...and maybe fucked silly every once in a while.”

“You really don’t want to hurt anyone?” Shining asked, “What about what you did to Luna?”

“I can’t help it.” I continued, “I can’t help but act out on whatever desire Duskie has when I change, I figured out that much. I admit I regret doing so, I didn’t want to hurt her but I’m usually left so hot and horny after I change I can’t think straight.”

“It’s that bad?” Cadance wondered aloud.

“It affects me as badly it does you...” I said sadly, “Mac must think I’m an utter slut...” I sat back down on the bed, “What would Luna think if she saw me like this, or how about my friends or better yet Mom and Dad?” I let out a fake and empty laugh.

“...” Both Shining and Cadance remained silent.

“I-I could just go out and shout to their faces: Hi did you know I jump the gender gap and turn into a nymphomaniac?” I could feel a few tears run down my cheeks, “For fucks sake, I just tried to get you to fuck me earlier!” I couldn’t help but let out another empty laugh. “I can’t help how i act and to make it worse Duskie’s getting all the flak for it, even though we’re literally the same person.”

“D-Dusk...I...” Shining put hand on my shoulder.

“I’m torn Shining...I’m torn between two ponies.” I muttered softly, “There’s a part of me that always be head over heels for Luna, but recently...I-I just want to be in Mac’s arms right now...” Cadance gave me a sympathetic look, “It’s even worse that Duskie is getting all these feelings as well...”

“What should we do about this Shining?” Cadance asked her husband, Shining rubbed his temples wondering what to do.

“...We don’t tell Celestia about this...I get the feeling she knows already.” My older brother groaned, “But we will tell Dusk about this. This isn’t something we can keep from him.”

“...I see.” I nodded solemnly, “I guess I can’t help it now.”

“You’re really serious about this aren’t you?” Cadance asked me. I nodded, even if I wanted to I couldn’t lie to these two...they’re family after all. I meant what I had told them, even I could only guess what Duskie would think of all this. I knew Celestia wouldn’t let me near Luna unsupervised after all this...maybe I could get Mac...I could only hope...

Author's Note

Here's the next chapter for you all. I'm glad everyone is enjoying the story. Well this turned out to have a bit more drama than I expected it to.

• Silent out.