Rarity panicked,

“Trixie, what in Equestria do you think you are you doing? This has gone far enough! I demand that you let me and Applejack go, right this instant! If you don’t, then I’ll tell Twilight, and she’ll tell Princess Celestia, and then you will no doubt be banished to the Everfree Forest for your crimes! You are going to be in so much trouble whe….mmfmffhhh!”

Suddenly, Rarity was gagged by a scrunched up ball of material, which was forced deep into her mouth.

She moved her jaw around, and tried to push the cloth back out using her tongue, but it was held in place by magic, and wouldn't budge. As Rarity struggled to un-gag herself, the unicorn suddenly felt a rope tie itself tightly around her lower waist, it rested against her back thighs and knotted at the bottom.

Turning her head, Rarity noticed that the same rope had already also been tied around the thin base of her tail, it had probably happened while she was busy giving Trixie a piece of her mind. It trailed over her back to form the loop around her waist.

“Mffmmffhhhh.!!” Rarity stomped and thrashed about, as the rope was then pulled between her legs.

Trixie grinned evilly as she tied another knot, in a very particular place. She then levitated the rope, which to Rarity’s horror followed the path of her private area, applying a small amount of pressure upon it. The end was then hooked through the tight loop at the base of her tail, and levitated over to Trixie.

“You are not going to whine your way out of this one.” The blue unicorn smirked. “I am going to remove your gag, and you are going to behave yourself.”

“MffuffhhH!!” Rarity frowned; a little pressure on her genitals wasn’t enough to break her.

To the unicorn’s utter horror, Trixie grasped the rope in her right hoof, and gave a little tug. The knot she had tied earlier was instantly pulled downward and held in place directly over Rarity’s clitoris.

“MHFHFFFFF!!!” The white unicorn moaned through her gag,

The harder Trixie tugged, the more pressure was applied to the area, and Rarity felt her entire body fall victim to the unicorn who now had full control over it.

“I said: you are going to behave yourself. Do you understand?” Trixie asked,

Rarity shook her head stubbornly,

Trixie tugged harder on the rope, and held it in place for a few seconds.

“MMMFMFFHHHHH!!” Rarity moaned.

Her head tilted backwards, her lower body hit the floor, but nothing could stop the horrible knot that was now stimulating Rarity. It was now applying a much greater amount of pressure to her most sensitive area; and she could do nothing to prevent it.

“Are you going to stop struggling and listen to Trixie?” The evil unicorn asked her prisoner, enjoying watching her squirm.

“MMFFFFHHH”

After a few more seconds, Rarity gave in. She nodded weakly, and Trixie stopped tugging.

“Good. Now, no more complaining.” Trixie removed the cloth from the unicorns mouth, causing her to cough and splutter a little.

Rarity said nothing; her eyes were fixated on the rope in Trixie’s hoof. She knew that that evil unicorn could pull it again at any given second, and send her body into a helpless, submissive state.

There was a moment of silence as Rarity recovered. Her clit was now throbbing, and she felt weak and vulnerable. To her utter horror, Trixie gave a slow, wide, grin. The blue unicorn stood upright and leaned backwards against the wall, resting her front hooves on the window ledge. She spread her legs, and then spoke to her new victim.

“Come here.”

Rarity timidly walked over, every step caused the rope to press a little against her crotch, but she tried not to let this show. She stopped in front of Trixie, and nervously looked up into her eyes, dreading what the unicorn had planned for her. She noticed that Trixie was sweating from head to hoof, and her cunt was open and dripping with cum.

“You hungry?” Trixie asked, and then pointed down to her wet mound.

Rarity gasped in horror, “You.. you can’t be serio…” She paused when Trixie lifted the rope again.

“All I have to do is give this a little tug, and you’ll be in the same situation as your little girlfriend was earlier” She grinned, “I can decide exactly how much pressure is applied, and how long it will last. It's pretty difficult to orgasm when there's a thick rope pressing against you, but I can bring you pretty close, maybe I'll even try a little spell...."

"No!" Rarity gulped, "No... I... I'll do it."

Rarity gulped, and for a few moments, she just stood there looking at Trixie's crotch. Her face glowed a bright red, as Trixie's thighs parted even more, giving her full access to the wicked unicorn's area. Rarity knew she had no choice; she had to do this, for her own sake, and for the sake of her beloved Applejack.

Closing her eyes, Rarity approached Trixie, stuck out her tongue, and gave a timid lick.

“OOOOOHHHHH” Trixie cried,

Rarity glanced up in confusion; Trixie was exaggerating her moans - she had barely touched her.

“Keep going!” The blue mare demanded,

Before she knew it, Rarity was forced to lick all around Trixie’s mound. She gave sharp little reluctant laps, feeling utterly disgusted with herself.

This time, it wasn't enough,

“LICK ME PROPERLY, YOU FILTHY LITTLE UNICORN SLUT.” Trixie pulled at the rope, causing Rarity to moan and obey.

She licked harder and harder, more and more furiously, brushing the tip of her tongue up and down Trixie's opening. She flicked it over Trixie's clit, doing whatever she could to please the unicorn.

“OOOOHHH I CAN SEE WHY THAT EARTH MARE LIKE’S THIS SO MUCH.” Trixie gasped; Rarity was actually really good at oral.

The poor unicorn continued to lick Trixie out as best she could. If she paused, or made a wrong move, Trixie would tug on the rope, forcing her to do better.

All kinds of thoughts were going through Rarity's mind: “This is horrible, what am I doing? How can I escape? What about Applejack….”

Then, Trixie came, right into her mouth. This reminded Rarity of the situation with her girlfriend earlier... and then, she remembered something else.

“Swallow!” Trixie commanded, pulling on the rope.

“OOHHH” Rarity moaned as she lapped up Trixie’s cum. Then, she stopped.

“What are you doing?” The blue unicorn asked frustrated, preparing to give the rope another hard tug.

To Trixie's Rarity looked up at her with half open eyes, and gave a weak smile.

“Oh Trixie, I’m sorry it’s just… you taste so… good.”

“What?” The mare was not expecting to hear that at all.

Rarity continued, “I’ve never tried another female unicorn’s juices before, it’s just so… mmmmm…”

She licked Trixie out thoroughly, appearing to enjoy every last drop of her cum. Trixie couldn’t believe it, but moaned as Rarity proceeded to eat her out.

“You really are a filthy slut.” Trixie insulted the unicorn, as her eyes rolled back into her head.

Rarity dipped her tongue into Trixie’s vagina, and pushed it inside. She swirled the tip around the inner walls, causing the blue unicorn to moan louder than before.

“OOOOOHHH Rarity!!!!" She cried, "OHHH YOU FILTHY LITTLE SLUT, THAT'S SO... OHHHHH."

Rarity didn't stop, she licked inside Trixie, and then asked her capture a very unexpected question.

“Trixie, darling, I was wondering, would it be okay if I… fucked you?”

Trixie froze, was this really happening? Was Rarity really enjoying this? Applejack had mentioned that her girlfriend enjoyed being a damsel in distress, but this... this was just...

"Please." Rarity gazed deep into Trixie's eyes, and the blue unicorn nodded.

Rarity looked happy to have been granted permission to enter the mare, she smiled gratefully, then lowered her head and pushed her horn inside Trixie.

"Ohhhhhhhhhhhhhh!!" Trixie had never felt anything so incredible, as Rarity pumped in and out of her body, she began to realise why Applejack loved her so much.

“Oh Rarity...this…ohhhh….is…. so good…” She panted,

Rarity's thrusting became faster and deeper, and Trixie's moans turned into screams. Rarity seemed to be enjoying herself too,

"Say my name." She commanded, and Trixie obliged,

"Rarity, FUCK ME RARITY!" It felt as though her mind was melting, she didn't know what was going on any more, but she was loving every minute of it.

"You like this?" Rarity asked, as she tilted her head, making sure to hit all of Trixie's spots.

"OOOOHHH YES,... IT'S.... OHHH RARITY!!!" Trixie had never felt this way before, it was pure heaven, pure ecstasy, she didn't think sex could possibly get any better, and then Rarity paused and looked the blue unicorn in the eyes once more.

“If you think this is good..." She licked her lips, Then you should let me vibrate my horn, just like I do with Applejack.”

Trixie's eyes widened at the thought.

"Applejack say's its out of this world; the most incredible sensation she has ever felt. It drives her wild, and I'm the only unicorn who know's how to do it perfectly. Let me do it Trixie, let me do it to you." She bowed her head, "I want to taste wave after wave of your juices, hear moan after moan, as you have the most powerful orgasm of your life." Rarity lowered her tone to a whisper. "Please, let me."

Breathless, Trixie gave a weak nod, Rarity seemed almost as turned on as she was at this point. This was a once in a lifetime opportunity; she couldn't possibly turn it down, besides, she still had the rope to control Rarity if anything went amiss. Trixie had been clenching it tightly whilst Rarity was pleasuring her; she didn't loosen her grip at all.

It took a lot of effort, due to her bodies weak state, but Trixie slowly cast the spell, and the collar around Rarity's neck started glowing. Rarity smiled gratefully as the collar was removed and gently lowered to the ground, and then, her own horn began to glow as she was once again able to use her magic.

The metal collar was suddenly thrust back past her at the speed of light. It clamped tightly around the neck of the Great and Powerful Trixie.

The mare gasped in horror as she was suddenly unable to use her magic. She tugged hard on the rope, but Rarity was too quick; she untied the knot around her tail, causing the whole thing to fall apart before her body was taken over by the sensation.

"Y...you!" Trixie fell to the ground.

She could barely stand, she was on the brink of climax, and now completely magic-less.

Rarity controlled the chain which held the blue unicorn to the wall, she pulled it backwards, so that Trixie couldn't take more than a few steps toward her.

"That was far easier than I thought it would be." Rarity smiled as she unravelled the rope and levitated it above her, along with a few feathers, a couple of brightly coloured bottles, the tasselled whip, and most importantly, the spell book.

Trixie's eyes grew wide as she pulled at her chain, "N...no... you wouldn't..."

Rarity then approached Trixie, with a menacing smirk upon her face.

Author's Note

There you go! Sorry about that!