Twilight made her way out of Fluttershy's cottage and headed back to Ponyville to see Pinkamena and Derpy. As she did, Night Light followed, not even seeming to notice that it was dark out.

Once they got to Sugarcube Corner, Twilight pushed the door open and entered. "Hello? Anypony still awake?"

Scootaloo looked up from behind the counter. "Hey, Twilight!"

"Oh," said Twilight. "Hey. You're back."

"Yep. Sweetie Belle and Apple Bloom had to go home."

"I see. Is, uh... your mother up?"

"Yeah. I think she's downstairs with Derpy."

Twilight nodded. "Come, Night," she said, making her way downstairs."

Night Light followed obediently. Twilight went downstairs to find Pinkamena at her desk, sorting some files with Derpy laying at her hooves.

"Hey, Pinks," said Twilight.

The pink mare turned around. "Twilight. What do you want?"

"Oh, I was just wondering if, uh..." She paused and eyed Derpy. "if Derpy still wants to have a little fun."

The gray mare's head came up as she looked at Pinkamena, excitedly.

The pink mare smiled. "I think she does. Why do you ask?"

"Well, I was thinking that we switch pets and... have some fun with them..."

Pinkamena hesitated but smiled and looked at Night. "And you're sure she's up for it?"

Twilight giggled. "Oh, I don't think she'll mind. Not now, at least."

Night Light smiled dazzly as she nuzzled Twilight's flank.

"Night, sweetie," said Twilight. "Why don't you go and show Pinks a good time?"

The blue mare smiled and nodded. "Yes, master."

The pink mare grinned. "Heyy, Derp? Would you like to take this chance to dominate Twilight again?"

The grey mare smiled and all but drooled as she nodded.

"Then go for it, sweetie," said Pinkamena, getting out of her chair and giving Derpy a tap on the butt.

The grey mare jumped forward, tackling Twilight to the floor and wrapping her forelegs around her so she couldn't move. The grey mare smiled lustfully down at the unicorn.

Twilight smiled back. "I'm ready for you, Derpy."

"Then, you won't mind if I get some toys?" Derpy asked. licking Twilight's neck.

The unicorn shuddered. "Go for it."

Derpy put Twilight down and raced upstairs. The unicorn laid on her back and looked over at Night. The blue mare had her head behind Pinkemena's plot, her tongue buried in the mare's slit. Pinks moaned as she lowered her top half to the floor. As the did, Night switched and dug into the mare's pink tail hole.

The pink mare gasped. "Oh, yes!"

Night dug her tongue deeper as she slid a hoof to Pinkie's dripping slit. She then started grinding on it.

Derpy came back downstairs and dropped a pile in front of Twilight. A ball gag, blindfold, collar, leash, spread bar, bondage cuffs, a butt plug with a string of fair-sized beads, and on top of it all was an odd looking horn ring with feathery, frilly headdress attached to it. Derpy nuged them closer to twilight "let's get you dressed" she cooed lifting the horn ring

Twilight smiled. "What do I put on first... master?"

"The cuffs," Derpy said commandingly.

Twilight smiled and levitated the cuffs over to her, attaching them to her forelegs. As she did, Derpy buckled the collar to her neck. "Now, the hind set."

Twilight smiled and rolled onto her stomach, raising her flank in front of Derpy.

The gray mare slid a cuff on both of Twilight's hind legs, then picked up the ball gag and pressed it to the mare's lips.

"Open."

On the other side of the room, Night Light had began nipping at Pinkamena's flank. She then pulled out of the mare's slit for a breath of air.

Twilight obeyed Derpy and opened her mouth as Pinks looked back at Night with an extremely sexual look.

The blue unicorn lowered her head, lining her horn up with Pinkie's tail hole.

"Put it in?" she asked.

Pinks nodded. "Oh, yes..."

Derpy finished strapping the gag in place when she pulled Twilight's forelegs under her and hooked them between her hind legs, making Twilight lay her chin on the ground. She then held her with her legs spread and hind end up high, the string of beads dangling over Twilight's head.

"Ready, pet?" Derpy asked.

Twilight let out a muffled response and nodded.

Derpy went behind Twilight as the purple mare felt the first bead slide into her tail hole.

"That's one..."

Night used her forehooves to grip either side of the pink mare's flank as she slid her horn in till it was completely inside Pinkamena. She then slowly started pumping in and out.

The pink mare gasped. "Oh, Night, yes!"

Twilight let out a gasp and and moaned.

Night quickened her pace as Derpy slid three more beads into Twilight. "2...3...4..."

Pinks moaned more constantly as Twilight began panting. Soon, Night Light was pumping as fast and hard as she could. Derpy slid the last four beads into Twilight and slid the frilly horn ring on her. She then started proding the rather large butt plug's tip into Twi.

"You want this in you, don't you pet?" Derpy said mockingly.

Twi nodded, wiggling her butt suggestively.

Derpy forced the toy into Twilight and trotted around in front of her, holding a remote with a single butten on it. In her mouth, she held the blindfold. Twilight looked up at her with submissive eyes.

"Oh, this is going to be so sweet," Derpy cooed as she wrapped the blindfold over Twilight's eyes. "Ready to be broken?" the gray mare whispered into Twilight's ear.

Twilight gasped as she no longer could see. She could only hear Pinkamena's moans on the other side of the room. She heard a click and each of the beads, along with the butt plug, came to life, buzzing and vibrating within her. She let out a constant moan that changed in pitch. As she came to the peak of pleasure, she felt ready to climax. However, after five more minutes, her release still hadn't come. She let out a whimper and started to squirm uncomfortably. When she moved, something swated her flank, leaving a line of stinging pain. She winced and gasped. There was another swat across her left cutie mark, followed by a giggle. She whimpered again and whimpered. This time, a hard swat hit her slit, sending a jolt of bolth blissful pleasure and searing pain into Twilight's nethers. The mare let out a louder moan this time, eyes starting to tear up. There was another giggle. Twilight squirmed some more, squealing, which got her two swats on the flank and a extra hard one on her nose, all followed by another giggle. The unicorn winced again, eyes watering and soaking the blindfold. There was another click as the beads vibrated harder and faster. Twilight squealed uncomfortably, which earned her another swat on her nethers followed by the beads speeding up even more. The unicorn then decoded to try something new and did her best to not squirm, letting out a stifled whimper. She was rewarded with a pat on the head. A hoof was then pressed on her nethers, clearly intending to be shoved into Twilight's nethers.

"Does my pet want me to fill her needy hole?" Derpy whispered into Twilight's ear, forcing the tip of her hoof inside the bound mare's helpless nethers.

The unicorn nodded. "Mm-hmm..."

Twilight felt a wave of now agonizing pleasure rocket its way through her body as Derpy's hoof was forced into the purple mare, only stopping when Twilight felt Derpy's chest touch her rump. Her marehood was now utterly packed with a grown mare's hoof in it. Twilight even felt her tummy bulge with Derpy's hoof. She let out a loud moan of pleasure.

Then she heard Derpy speak. "That's how ya do it, Night. Now, start twisting your hoof in her."

Twilight gasped, hearing that it Night. Then she got slightly more turned on as her marehood leaked. At Derpy's words, the hoof in Twilight started turning left and right, sending the most intense pleasure all throughout Twilight. She still had yet to be allowed to get off. Twilight had been on the edge for what felt like hours, yet still desperately needed to get off.

Ten minutes passed as the hoof inside Twilight twisted, turned, and even pumped the purple mare's now quivering marehood.

Twilight kept letting out moans. "Mmmm...."

"Oh, this is just to much fun!" Derpy called. "I could just keep you like this forever. Just think of it, Twi; Every waking moment of your life would be spent being pleasured and never able to get off... A few weeks and you'll be so addicted to the feeling you can't live without something stuffing every hole." As Derpy spoke, bolth the hoof and vibrating beads got rougher and faster.

Twilight gasped and began to cry.

"You want that, don't ya girl?" Derpy asked.

Twilight shook her head.

"No?" the grey mare called in a mocking way. "Does the pet want off, perhaps?" she asked as the hoof was quickly yanked from Twilight's nethers.

Twilight nodded. "Mmmmmm!!!"

Derpy put her muzzle against Twilight's ear. "Then, cum for me, little pet," she cooed as she yanked the butt plug and beads out with a loud pop that sent a final surge of pleasure down Twilight's spine as she was finally able to cum.

She let out a massive moan as she was released from her pain of pleasure.

Nearly 15 minutes passed before Twilight came down from her orgasm. When she did, she felt her legs were no longer bound in place and the ring had been taken off her horn. She also heard a lapping noise like a dog licking water.

"Mmmpf?" she mumbled, panting and limp from exhaustion.

The clasp to the gag came undone and fell from her mouth. Twilight removed the blindfold and looked over her shoulder. Behind her, Night Light was licking up the large puddle that extended out from under Twilight. On the far end of the room Derpy had curled up next to Pinkamena's desk with a pleased smile.

Pinks rubbed Derpy's butt. "Good girl."

Derpy smiled.

Twilight stumbled to her hooves. "D-Don't... e-ever... d-do that a-again..."

"Awww, why not? You'd make a good cum-slut," Derpy cooed, smiling wickedly at the purple mare.

"B-But... I-I'm a master... I-I can't be a c-cum-slut..."

The grey mare took a step closer to Twilight. "A few days alone with me can change that..." she said, licking her lips.

"But... I have a pet. I'm a master. I can't... NOT... be a master..."

Derpy stepped up next to Night and licked the mare's cheek. "Well, if I broke you, I'd have two pets," she said, looking down at Twilight with an air of dominance about her.

Twilight stood up. "I'll never be your pet, Derpy. So, just forget about it. I'll have sex with you, for sure... but I won't... be... your pet."

"We'll see," Derpy cooed, trotting to Pinkamena's room and out of sight.

Twilight looked back at Night, who was still licking up her puddle.

"Like your master's juices?" asked Twilight.

Night Light nodded, her eyes still having the glow of Twilight's magic in them.

"Mmm... I wonder what would happen if I got Derpy to drink my raw magic..." Twilight thought aloud but not loud enough for Pinkamena to hear.

Night Light didn't comment but smiled at Twilight, obediently listening to her master.

"Maybe later," she said, snapping out of her thoughts. "Ready to head home and get some sleep?"

The blue mare nodded. Twilight got up and stretched before heading to the stairs.

"Well, it's been fun Pinks. Have fun with your slut."

The pink mare smiled. "Oh, I will," she said before heading to her bedroom.

Twilight picked up the crate of vials and headed up the stairs. As she did, Night Light followed behind her, once or twice nuzzing Twilight's cutie mark. The unicorn giggled as they left the building and began heading home.