A few days passed after Trixie's father came to visit her, and the little filly was laying in her crib staring up at a mobile slowly swirling overhead. She woke up and couldn't seem to go to sleep the next day, realizing that this was the day she was supposed to be betraying Twilight. But she was coming to a realization she'd be taking on Starlight and keep her from taking the spy teddy from her at all costs. The little blue-coated filly was still too nervous to tell Twilight the truth as their relationship had grown a lot since her father's visit.
Trixie could feel that she had soaked her diaper once more, and she usually would whimper a little or something like that to wake Twilight up to change her. Curious about what Twilight was doing today; however, Trixie just got up on her hind legs while showing off the adorable violet sleeper.
The baby unicorn then looked over, seeing that Twilight was fast asleep this morning, and she realized that her caretaker hadn't slept that much this week. Trixie didn't want to wake her up. So she buried herself under the covers and started to suckle on her pacifier as she thought things over.
Trixie laid in her crib suckling away as she was starting to feel guilty for everything she'd done up to this point: Lying and spying. The little blue-coated filly was now focused on thinking about what she wanted. She took out her spy teddy and asked out loud: "Does Twixie want to stay a foaw? Ow shouwd Twixie westawt hew wife with Twilight being hew mommy?" Of course, her teddy didn't say anything back, but she was starting to groan as she realized something. "If Twiwy finds out I betrayed hew, ten she gonna have me turned back to nowmaw and ten have me banished fwom Ponyviwwe!"
Trixie then plopped back down on her padded rump and started to suckle away on her pacifier, thinking things over a bit. Then out of nowhere, an idea suddenly came to mind as she looked back at the teddy and shouted out loud. "So that means I just gotta beat Stawwight and keep Twiwwy fwom finding ya! Ten Stawwight gots nothin!"
That would mean Trixie would need to dispose of the teddy bear before Starlight comes back…." Sowie, teddy. I hope ya dun have had feewings, but if Stawwight gets hew hooves on ya, a lot of ponies wiww get huwt."
Trixie then took the teddy and hugged the plushie close to her chest while she cried. "I sowie. Tis aww my fault, but ya gots ta go!"
She lit her horn and took the teddy with her magic. Trixie grunted, doing her best to charge her horn with as much magic ability as she could muster. With tears in her eyes, she surged a wave of electricity through her horn and hit the teddy, setting it ablaze! The little filly sat there and just watched as the teddy bear was engulfed in flames as it slowly smoldered into a pile of ash. Trixie's face was now in tears as she stammered. "Sowie, spy teddy…." She then used what little energy from her horn to poof the ash into a puff of smoke; that way, there was no evidence.
Trixie wiped the tears from her eyes and then laid back down in her crib. "Weww, now there's no mowe spy teddy. Now I just gotta face Stawwight and keep hew fwom finding Twiwy's amuwet."
Later that morning, Twilight went about her day: Changing Trixie's diaper, feeding her, and then watching her practice magic by stacking blocks on top of each other. Twilight noticed that the filly had less struggle than she was a few days ago. But she looked somewhat exhausted for some reason, making a mistake here and there. And there was something else too.
"Hey, Trixie," Twilight commented. "I noticed your favorite teddy is gone."
"Oh, um...Trixie must've wost hew teddy. It's otay; I gots wots more stuffed animals." Trixie explained rather nonchalantly.
Twilight found that answer rather suspicious. She'd seen the little filly take that teddy everywhere. And now she suddenly didn't care that she'd lost it? "Alright, just curious is all," She said, at last, deciding not to press on the matter. She then trotted over to Trixie and asked. "Now, I know that you like being a foal; that much is obvious. But you should know that I tested the amulet on Rarity yesterday, and it worked perfectly."
Trixie paused as she stacked the last of her blocks on top of each other then looked over at Twilight. "C..can I wait until tomorrow? I just wana to be a foal for one more day."
"Ok, that's fine with me." Twilight cooed. She then sat down next to her foal and ruffled her mane. Trixie nuzzled into her, then pointed downward, and Twilight nodded. She knew that she was hungry.
Trixie once again held onto one of Twilight's teats and suckled away, enjoying the warm milk flowing down her throat.
Twilight, meanwhile, was thinking that tomorrow she'd ask if she wanted to stay as a foal. The thought has crossed her mind multiple times over the week, and the truth was she wasn't sure if she was ready to be a full-time mom. True, she'd taken care of Celestia and Luna and her brother and his wife. But being a mom for years, she wasn't sure she was ready for. But seeing Trixie, Twilight was confident of her potential in magic. She might not have the raw talent Twilight had had as a foal. Still, she made up for what Trixie lacked in ability; in determination.
Maybe if Trixie were raised upright, she would be even greater at magic than she was before since Trixie would be surrounded by ponies who'd support her.
Twilight laid her head down and relaxed, letting her foal continue to suckle from her teats. Maybe she could make a real difference in Trixie's life by having her grow up here in Ponyville.
Later that evening, Twilight and Spike were fast asleep once more, and Trixie was wide awake. Her heart was thumping in her chest. She then turned to see Midnight fly through the window, and she threw her mane with a smirk. "So, Trixie, ya weady?"
"Y...yeah…" Trixie stammered as she teleported herself out of her crib. They both slowly trotted downstairs.
There they came upon Starlight, who was still a foal. She was sporting a poofy diaper, along with a cape around her neck and a scepter in her hoof. "Hewwo Twixie and Midnight, ya weady to be big ponies again?"
Trixie gulped, seeing that this was it. She'd already made her decision to betray Starlight when she'd burnt her spy teddy. So now she had to only take her own and show her resolve. "Sowwie, but ya faiwed! I buwned ta spy teddy!"
"What?! Ya serious?! Why would ya do tat?!" Midnight cried out.
"Because I weawise we awe wong!" Trixie insisted. "Tuwning ponies into foaws against thiew wiww is wrong! And I think we need to stop tis wight now!"
Midnight gnashed her teeth and shouted! "Sweiouwsy?! She was ta onwy way we gonna tuwn back to normal!"
"I don't care! I'm gonna be adopted by Twilight and wive my wife hewe in Ponyviwwe, so ya can buzz off!" Trixie snapped with a smirk on her face.
Starlight just stood there, then burst into a fit of laughter and clapped her hooves. "Sowie, I should've been more specific; I know exactly what ya did aww week. I've been watchin' ya and tats why Midnight became my twue spy."
"Huh?" Trixie turned to see Midnight with a smug grin as she pulled out a plush rabbit.
Midnight explained. "I saw how ya acted at tat magic show and weawised ya was wiking being a foaw too much."
Midnight then threw the rabbit to Stralright, who snickered. "We both also know tat Twiwy has an amulet...or I shouwd say had," Starlight then pointed at her staff, revealing that the amulet was on top of it. "So wike it ow not, ya gonna be a foaw fow a wong time!"
Trixie cursed herself as she saw that Midnight and Starlight had tricked her! The blue-coated filly realized that she indeed had done nothing in keeping Twilight and her friends safe. What's worse was that she probably should have warned them. But her fear of being discovered as a spy had made her weary, and now it may have cost them everything!
Suddenly, feeling a sense of determination, Trixie stomped her hooves. "Put ta bunny back in my toy box!"
"What?!" Starlight asked, being somewhat stunned at Trixie's response.
"I said put ta bunny back in my toy box ow ya gonna get it!" Trixie shouted! She then planted her hooves into the ground and lit up her horn.
Midnight burst into laughter. "Get hew, Stawwight! Put hew back in Twiwy's tummy!"
Starlight smirked. "Good idea, that way it'ww give us time to defeat ta west of hew fwiends and keep hew shut!" Her staff then lit up as energy shot out from it!
Trixie did her best to jump around, dodging the blasts of magical energy being shot at her! Some residue of one must have hit her as she felt herself shrink a little. Trixie then ran behind a coach and hid there to catch her breath. "Gotta be careful!"
Starlight was right behind Trixie, chasing her as she shouted! "Ya, get back here!"
Trixie gulped as her forehead began to sweat, realizing that she should be shouting for help! But then Twilight would know of her betrayal!
Then, an idea came to Trixie as she took out a plush Ursa Minor left behind from earlier and used her magic to set it up with a small cone block on top of it. She smirked, seeing that she could (hopefully) have Starlight use her magic at the plush bear while taking the opportunity to take the staff! She then went under the chair and then waited for Starlight to come around.
The little grayish-purple coated filly trotted over as she looked over at the plush. Trixie smirked, seeing the filly's horn light up and send magical energy towards the plush animal. But nothing happened. Trixie then flew out of the couch and sent her padded bottom right into Starlight's face, throwing the filly off as the staff flew across the room as the bunny plopped down!
Seeing Starlight dazed, Midnight flew towards the two.
Realizing her limited options, Trixie ran across the library and snatched up the staff!. She then turned to see Midnight grab the bunny and lift Starlight up. Trixie aimed the staff at the two. "I know that this is the awicorn amuwet. I feel the same magic as before, so I can easily tuwn ya both even younga!"
Starlight cursed as she shouted! "Fine, keep tat stupid staff! But we got aww ta info we need to take ya and you fwiends down!" She then lit her horn, and the two other foals suddenly disappeared.
Trixie smirked and started to bounce up and down, being excited that she had taken the staff!
But now Starlight had all that information, plus Midnight had rejoined her!
"Trixie, what's going on?" Trixie turned to see Twilight trotting downstairs, and Trixie stood there with the staff in hoof as she sighed. "Twilight wet me explain."
It was now early the following day. Despite getting almost no sleep, Twilight was astonished by Trixie, who explained everything about the spy teddy, Midnight's betrayal, and having her learn about her friends through the friendship lessons.
It took a few hours, but Twilight nodded, "Right...it seems Starlight is able to still travel through time. But it seems she can't go back in time twice. If she did, she could easily go back in time to that confrontation and just take Midnight and leave. But seeing that we still have the amulet, I would say we're fine."
Trixie was starting to tear up as she was now scared that Twilight was going to banish her. "I...I sowie. I know ya can't forgive Twixie, so before ya banish me at wears wet me say bye to Zecowa!"
Twilight then slowly trotted over and hugged Trixie. "Banish you? I can never banish you! As much as I wish you'd just told me the truth, you not only decided to go against Starlight, you risked yourself in the process. If you did call for help, I may have underestimated Starlight, and she could have turned me into a foal. But she didn't expect you to be so cunning. You took advantage and got the amulet back."
Twilight then placed a hoof on the amulet around her neck. "Now we have the amulet secured. And even if Starlight has all that information, we can always change our friends back to normal as long as we have this," She then bent down to Trixie's level and faced her. "But now we have one more thing we need to discuss. Do you want to return to normal, or do you want me to be your mother?"
Trixie gulped and scrunched the diaper between her legs and whimpered, "T...Trixie wants ya to be my mommy…."
Twilight started to teared up, and then in a burst of emotion, she reached out and hugged her foal close to her chest as she cooed. "Alright, it's a deal. But from now on, I will be much stricter; I have to make sure you grow upright. And on top of that, you're going to be punished for your deceit."
"Oh, what sort of punishment?" Trixie nervously asked.
Twilight smirked as she then began to tickle her filly's belly and cooed. "We're going to throw you an adoption party, and I want you to perform your adorable magic again!"
Trixie squealed in laughter, kicking about as she shot Twilight a smile. Being a foal again meant she could try once again to be a part of Princess Celestia's School for Gifted Unicorns, and maybe this time, she could pass her initiation! It also meant she could have awesome friends like Zecora! And as long as she was by Twilight's side, she'd do her best to protect her new mommy and make up for her mistakes.