After Queen Chrysalis and the Changelings have been defeated, all of Canterlot was finally at ease. There was virtually no chance that the changeling queen and her minions would threaten Equestria again thanks to the elements of harmony that ended the invasion. However, the threat itself could have been avoided. It was rather mysterious how Chrysalis got a hold of Princess Cadence without being detected throughout all of Canterlot, but what was even more mysterious was how nopony was able to notice that Cadence's behavior was a lot different from her usual self. It wasn't until Twilight Sparkle noticed that Cadence wasn't who everypony else what who they thought she was. After warning her loved ones about Cadence being something else, she was abandoned at the wedding hall, only to be held captive by the Cadence imposter.
However, that situation alone was a major turning point in this whole event, as Twilight was able to realize that Cadence was imprisoned in the mines below the Canterlot castle. And thanks to Twilight's noble efforts, she and Cadence were able to escape the mines and confront the changeling threat. Shining Armor, captain of the Royal Guard, was imprisoned by Queen Chrysalis's mind control spell. With the power of Love, Cadence was able to break Shining from his mental prison.
Together, everyone was triumphant in their battle against the changelings.
Twilight Sparkle rushed towards Princess Celestia after she had been beaten by the Changeling Queen's magic. As Twilight came to her, the alicorn princess place her hoof on Twilight's shoulder.
"Don't worry about me. I'm fine. You have a real wedding to put together". Celestia told her with a smile.
Those words hit Twilight like a ton of bricks. It reminded her of an event that was more horrifying than anything she had experienced in her existence in Equestria.
"Well, what's everypony waiting for? Let's start geting this party kickin!" cried Shining Amor in Joy.
Twilight felt nothing but hatred for what her brother had done to her back at the wedding rehearsal. All she did was try to warn him, and then he shunned her, just because he couldn't tell the difference between Cadence's real personality and the way she acted while getting the wedding set up. With what her brother said, it was as if he'd already forgotten what he had done to her.
In a nasty fit of rage, an aura of magic surrounded her horn, but her brother's neck as well. Shining Armor started gasping for air, then collapsed to the floor. Her friends, Spike, Celestia, and Cadence watched in shock as Twilight used her magic to strangle her brother.
"TWLIGHT, WHAT ARE YOU DOING!? PLEASE STOP!" shrieked Cadence in horror, in utter disbelief that Twilight would even use such violence on her brother.
"What in tarnation is the matter with you, Twi!?" yelled Applejack.
Twilight continued to strangle Shining with her magic, as he continued to choke. His eyes then started getting bloodshot. Cadence continued begging Twilight to stop, while tears streamed down her face.
"TWILIGHT SPARKLE! STOP THIS, THIS INSTANT!!" roared Celestia.
Twilight kept strangling Shining Armor, getting to the point of his neck starting to break and his windpipe getting crushed.
Being left with no choice, Celestia, used her magic to hit Twilight to the ground, It was non-lethal, so it didn't hurt her.
Now with Twilight's magic released from Shining Amor, he coughed violently regaining his air. Cadence dashed toward her fiancé to make sure he was alright.
"Shining honey, are you okay!?"
Shining struggled to get up, still coughing for air. He was in utter disbelief for what just happened.
"She just tried to kill me!" he said in utter shock.
Shining was finally able to get up, he saw Twilight on the floor, who was still slightly incapacitated from the impact of Celestia's magic. He then slowly walked up to her, but not in a way like he normally would, as his neck still felt lots of pain.
"Why did you do that!? Have you completely lost your mind!?"
Twilight then slowly looked up at him with a glare. Shining Armor's expression was filled with both sadness and shock for what she did to him.
"Get away from me!" she said in a nasty tone, but she didn't yell it.
Shining slowly backed away after what Twilight just said. Everyone else in the room was full of confusion of why she is behaving this way. Shining was even more confused, how Twilight would do this to his own brother.
"What has gotten into you!? Have you gone completely mad!?"
Twilight was finally able to get up, then stared up to her brother. "So now you care? After what you just did to me!?"
"What are you talking about?"
"ALL I DID WAS WARN THAT YOU AND THE REST OF NOT ONLY CANTERLOT, BUT ALL OF EQUESTRIA, WAS UNDER THE THREAT OF ATTACK, AND WHAT DO YOU DO, YOU CAST ME ASIDE AND TAKE MY FRIENDS AND MENTOR WITH YOU, JUST SO YOU COULD HAVE YOUR LITTLE WEDDING!!!"
Shining has now realized what he had done. Instead of Listening to his sister, he had cast her out of his wedding.
"But Twily, I couldn't have known, I thought that she was actually Cadence!"
"Of course you didn't know, you were under a spell, don't you get it!? That's what Changelings do, they use their magic so you can't find their true Identity. Besides, that has nothing to do with that fact that you took her side over mine! Tell me Shining, why was somepony you had just met more important than your own sister, your own flesh and blood for Celestia's sake!? If it wasn't for me, this stupid wedding wouldn't have happened in the first place!"
She stomped her hoof and then continued.
"And you had the NERVE to say that the wedding isn't important to me when all I ever did was try to save your skin! What kind of brother are you Shining!?"
Cadence walked up to Shining Armor, not understanding why he would do such a thing. "Is this true, Shining? Did you really cast her out like that, after all that she's done for you?"
"Yes, yes it is Cadence. I dismissed her from the wedding. It was almost as if I disowned her entirely."
Cadence couldn't believe what he just said. It was straight from the horse's mouth. Her eyes started welling up in not just sadness, but anger as well.
"How could you do such a thing Shining Armor!? She's your damn sister!"
"What was I supposed to do!? I couldn't just let her go off like that right in the middle of our rehearsal!"
"So that was your only option, to just buck twilight like that!?"
"What would you have done if you were in that position!?"
And with that, Cadence gave him a hard slap in the face. Everyone in the room gasped, except Twilight of course.
"How dare you turn this around on me! You really think I would just shut her out like that after all we've been through!? She wouldn't have done something like that if she didn't have a good reason!"
The amount of guilt Shining Armor had in him was unbearable. He didn't just let his sister down, but his fiancé as well.
Twilight then turned to her friends with a mad glare.
"And YOU! Instead of comforting me and taking my warnings seriously, you felt it was in your best interests to kiss his sorry flank!" she yelled as she pointed her hoof toward them.
"It wasn't our fault, Twilight. We didn't know whether to believe you were blindly accusin' Cadence or if you were actually right. We were powerless to do anythin', because if we sided with you, we probably would've gotten thrown out as well." said Applejack in a sympathetic tone.
Twilight was having none of it. "So you were actually concerned for me, despite leaving me all alone? I call horseapples. You were more concerned with that so-called "Cadence" then your own friend!"
"We're trying to make it up to you, Twilight! Can't you just give us a chance?" Cried Rainbow Dash,
"Well apparently you didn't give me a chance. Even with Equestria at stake, you were worried about this wedding."
Twilight then turned to Celestia.
"How could you Celestia, you've been my mentor. Why couldn't you trust me back there?"
"Twilight please, we were just acting on your brother's behalf. Had you brought proof then this could've turned out differently." said Celestia.
"On his behalf? You're the princess, it's your job to keep Equestria safe by any means necessary! Was the wedding so much more important than that?"
"She's my niece, Twilight! I couldn't bear to see her in such distress due to your Abhorrent behavior!"
"I get it, because she's your family. Even then, you still couldn't tell that her nasty behavior wasn't an indication that something was wrong with her. And yet, you tell me I have a lot to think about, so do you apparently."
Celestia couldn't say anything, because she knew that Twilight was right.
Twilight started facing everyone in the room. She was ready to show Cadence what was really said by Shining Armor, her friends, and Celestia. It was a type of magic she had secretly been learning by herself, without letting Celestia, her friends, or even Spike know about it. With that magic, she can go back in time and show what happened in the past.
"Cadence, if you really want to see what really happened, then I will show you."
Twilight shot glowing streams of magic in the air, like as if it was purple smoke. It formed as a large sphere above everyone in the room. Seconds later, it showed everyone back when the wedding rehearsal, when Twilight went off on Cadence saying she was evil and that she had been using magic to brainwash her brother, driving her out of the room. Even Cadence knew that Twilight was acting out of light, but still felt that she knew that something was wrong about "Cadence". However, nothing could prepare her when she was about to hear what Shining Armor had to say.
"You want to know why my eyes went all-? Nuh! Because ever since I started having to perform my protection spell, I've been getting terrible migraines. Cadance hasn't been casting spells on me. She's been using her magic to heal me! And she decided to replace her bridesmaids because she found out the only reason they wanted to be in the wedding was so that they could meet Canterlot royalty! And if she hasn't been on her best behavior with your friends. It's because with me being so busy, she's had to make all the decisions about the wedding!
Shining Armor, Twilight's friends, and Celestia knew that Cadence was going to be beyond outrage what he was going to say next, especially what the others would soon say.
"I was just trying to-" said past Twilight.
"She's been completely stressed out because it's really important to her that our big day be perfect! Something that obviously wasn't important to you!"
Cadence was beyond shocked that he would say such demonic words to her own sister. Rage started boiling inside her.
"Now if you'll excuse me, I have to go and comfort my bride. And you can forget about being my best mare. In fact, if I were you, I wouldn't show up to the wedding at all."
Shining then lowered his head in utter guilt, his eyes closed, nearly on the verge of crying.
Then they saw the past Twilight's friends walking out of the room with him.
"C'mon, y'all. Let's go check on the princess." Said past Applejack.
Fluttershy started to break down and cry, Rarity comforting her.
Then past Celestia walked past Twilgiht saying "You have a lot to think about" leaving past Twilight emotionally pulverized.
As everyone one saw the wedding hall door slammed on Twilight, she said "I could have gained a sister, but instead, I have lost a brother."
Shining armor looked at Cadence, the expression on her face was heartbreaking for him to see. Her moth agape, her eyes widened, tears streaming down her eyes. He walked up to her in an effort to comfort her.
"Cadence I-"
"DON'T TOUCH ME!!!" Cadence screamed, moving way back from him. "YOU'RE SICK, YOU'RE DISGUSTING!!! I CAN'T BELIEVE YOU WOULD BE SO VILE!!!! GODDAMN YOU SHINING ARMOR, GODDAMN YOU!!!".
Cadence then madly turns to Celestia. "AS FOR YOU, YOU COULDN'T NOTICE THE DIFFERENCE BETWEEN MY BEHAVIOUR OR AN IMPOSTER'S!!!??? HOW COULD YOU DO THIS TO TWILIGHT AFTER ALL SHE'S DONE FOR YOU!!!???"
Cadence ran away, sobbing uncontrollably.
Twilight walked up to Shining Armor in complete apathy. "Well Shining, are you satisfied with what you just called? ARE YOU!?"
"Twily, please stop this".
"Stop? Stop what? How can I stop something if I didn't start anything? It was YOU who started this!"
Twilight went to same direction where Cadence left at. "I'm going to comfort Cadence, so don't even think about following me" she said as she then left.
Shining armor let out a big sigh. Twilight's friends couldn't believe what just happened, seeing Twilgiht get so angry like that.
"So, there's no wedding?" whimpered Pinkie Pie.
"I think it's safe to say that it's not happening" sighed Shining Armor.
"I'm sure they will eventually cool off. These are indeed troubled times, but hopefully it will soon pass." said Celestia.
"I guess I deserved this then." said Shining Armor in defeat.
"We all deserve this, Shining, we all deserve it."