"So... um, Aunt Luna, where does Shining Armour live exactly?" Cadance asked.
"He lives in the barracks of course with the other soldiers." Luna answered. "Legally, I am not able to tell you precisely where that is, but I can tell you, should you go past the end of the cobblestone streets and then take a left at the first split, then go to the black tree and tap it three times, you will find something....good."
Luna trotted away with an evil smirk on her face, she wondered if Shining now knew someone would be coming for him, perhaps his worthless parents had already warned him, though she doubted they got the chance. Though maybe it would be better, if he knew what was coming for him, he'd be living in terror, the same terror Twilight lived in while living with that rot she called a family.
Luna began to smile to herself thinking of all that had happened. Normally she was not a pony of violence and tricks, but for a foal fiddler, she'd make an exception. If Cadance got caught, well, they'd simply tell the truth. Shining would never show his face again.
Cobblestone streets, cobblestone streets, cobblestone ah-! There it is! Cadance hummed to herself and tucked away the potion she'd made into her mane. And there was the tree.
Tap it? Cadance wondered. She lifted a hoof and gently tapped a knot in it's trunk three times, and the tree fell through the earth.
Oh. Cadance thought, That was easier than I thought.
"Hello! I wish to see the unicorn known as Shining Armour please." Cadance called into the tunnel.
A guard approached her, glaring. "And what is the subject of this mee- oh! Cadenza, I'll go get him."
"Hey Cadance!" Shining exclaimed. "What's going on?"
"Nothing important, I just wanted you to maybe take some time off to hang out with me." She smiled.
"Oh! Sure." The stallion smiled and fell into step beside the alicorn of love as she led him away from the rest of the ponies.
Cadance wanted to personally be the one hand down Shining's punishment. He'd trust her, and he'd also lied to her. To Cadance it did not matter that he had grown up with parents who may have taught him it was okay to torment his baby sister, he'd become a guard and taken an oath to not cause harm. An oath that once broken, the punishment was death.
"Oh, here Shining, I made you some juice, it's a special berry mixture." She hovered the bottle over to him.
"Oh, thanks?" He said taking the bottle in his magic.
"Well? Why don't you try it?" Cadance pouted.
Shining uncorked the bottle and took a small sip of the concoction. "Not bad."
"You should drink it all, it'll go bad quickly once it's been opened." She instructed, not entirely lying.
Shining downed the drink, and then shuddered.
"What-what did you do to me?" He choked.
"Oh nothing. Just a concoction of truth potion, with a little mind control, that's all." She waved her hoof. "Okay no, I'm not going to do that. Much fun as it seemed with Luna and Celestia."
"Why would you give me a truth potion?" He gasped.
"Oh, I think you know why." Cadance answered. "Now Shiny, follow me."
Against his will the white stallion was brought into the streets of Canterlot.
"Now, Captian Shining Armour of the Canterlot royal guards, I want you to tell me something."
His eyes went wide, thinking of all the secrets he hid in his life.
"No. Cadance, please don't." He pleaded, his voice magnified as Cadance cast a spell on it.
"Oh, someone else has a guilty conscious?" She smiled her own voice magnified as well. "Your parents did, too. Before they were banished to the mazes of the crystal mines. Now, what could they have done to deserve such a fate? Oh, that's right, they beat, raped and psychologically tortured your little sister, and not only did you do nothing to intervene, you joined in, didn't you?"
"Yes." He spluttered, trying to fight the potion.
A collective gasp was heard and Cadance happily acknowledged the crowd she had gathered. All according to plan.
"Did you, Shining Armour, of your own free will and at the time under no mind control, also rape, beat, and torment your little sister?"
"I did." He answered.
"That will be all." Cadance smirked ending the voice spell. "I suggest you run."
The crowd turned mob glared at the trembling royal guard.
"Oh, wait, before I forget. Shining Armour, you are hereby dishonorably discharged from the royal guard, you lose your title as captain and you lose your barrack as well. Your belongings will not be returned to you, they will instead be granted to the orphanage, to actually make some foals happy. And if you ever come near your victim again, I will destroy you, if this crowd doesn't first. Let it be known, if this stallion shall die at your hooves, not a single pony here will be tried for murder. Good day." Cadance smiled wickedly and teleported back to the castle, leaving the furious mob to handle Shining.