Collar and Conquer

“All right, Moonbutt,” said Greta, slapping Luna sharply on the ass. “You’re all mine now.” She blew out a short breath. “Really nice bedroom, by the way.”

“Thank you, mistress,” said Princess Luna.

“Hm, mistress,” laughed Greta, flicking the collar around Luna’s neck with one talon. “I could get used to that. “Especially since you’re gonna be my big blue slut from now on. How about you show me those royal tits and that alicorn ass?”

Luna pulled away the straps of her dress and pulled it downward, slowly peeling it away from her body. Midnight-blue tits bounced into view, succulent round delicacies topped with nipples of darkest indigo. When Luna pulled the dress past her hips, Greta knelt behind her, clasping the princess’ ass with her talons.

“Damn,” said Greta. “Like damn. This is a choice ass, princess. Just wanna snuggle up between those big beautiful cheeks…”

“I can locate shrinking or enlargement spells that would make that feasible,” said Luna, her voice still eerily absent of emotion.

Greta raised an eyebrow. “Uh, I was bein’ figurative,” she said, “But… put me down for a solid ‘maybe’ on tryin’ that out sometime.”

“Yes, mistress.”

“Hey, can you… y’know... loosen up?” said Greta. “I need you to be sexy for me, and you’re kinda… stiff. Oh, that reminds me!” She stood, and shook the vial from the sleeve of her black dress and drank the contents, wincing at the bitter taste. As her cock began to grow, she circled Luna, showing off the growing bulge that lifted the fabric of her dress.

“Stars above,” said Luna, biting her lip, “You’ve given yourself a stallionhood. Look how it grows…”

“Totally, totally,” said Greta. “It’s a horse dick, too, so suckin’ it should come natural to you. You’re old as balls, right, princess? You sucked a lotta dicks over the centuries? Lotta stallions been up in them guts?”

“I…” Luna’s expression, which had been doing a passable job of looking “sexy,” suddenly darkened. “My… sexual history is… is not… you…” She stumbled, as if lightheaded.

“Woah,” said Greta. “Are you fighting back? Shit. Kinda hot, but… could be a problem.” She lifted her skirt, letting her cock flop out, and pulled the whole garment up over her head. “Just sit down on the bed and take some deep breaths, okay? Try to relax.”

Luna seemed to calm down slightly as she took a seat on her bed. “Good,” said Greta. “I can help you loosen up, okay?” she took a seat beside the princess. “You want to relax, right? You want to feel good?” She put her beak next to Luna’s ear. “You want me to finger your pussy… don’t you?”

“Yes, m-mistress,” said Luna, parting her legs.

“Of course,” said Greta. She laid her hand on Luna’s thigh and slipped her talons lower, until the knuckle of one finger brushed against Luna’s clit. The princess shivered, drawing in a long, shuddering breath - and since greta hadn’t ordered her to speak or move, all she could do was sit there and let Greta’s talon go deeper. Another finger, and another, joined the first, probing Luna’s slick depths.

“Mmm, nice and wet,” said Greta. “I command you to get real slick and horny for my big griffon cock.” She stroked her shaft, feeling Luna’s fluids wash over the talons of her other hand. “Ooh, you’re gettin’ excited now… maybe you wanna take a taste of my cock, princess? Get your mouth around it before I stretch out that royal pussy…”

“Yes…” whispered Luna, slowly bending at the waist. “Yes… mistress…” Her body shifted uncomfortably, and she hesitated as her mouth descended towards Greta’s cock… but eventually her trembling lips touched the flared tip and began to envelop it.

“Ohhh yeah,” groaned Greta. “Me and Gilda like to play with each others’ cocks, but beaks can’t do the same job as a nice wet pony mouth. All night long I’ve been hearing ponies talk... but this is what your mouths are really good for.”

Luna slowly worked her face lower, taking more of Greta’s inches into her mouth. She was grunting, struggling, already gagging on the thick pink shaft. “Mmm, much better than talking, don’t you think, Moonbutt?” said Greta. “I’ve heard how you talk when your mouth isn’t full of cock. You’re all thees and thous and shit, right? Cuz that’s how everybody talked back when you went psycho and your sister had to slap the shit out of you…”

Greta laid her hand on the back of Luna’s head, pushing her further down onto her cock. “But now that you’re mine,” said the griffon, “You can just be my good little cocksucker. You don’t gotta worry about goin’ crazy again, you just gotta suck when I tell you to suck... and open your legs when I wanna nut in that tight princess pussy…”

Luna began to sound out muffled words, her mouth still stuffed with cock. Over time, the words grew louder - but not clearer - and Luna’s expression began to twist in anger. “Woah now, Luna,” whispered Greta, “Relax, okay? Just focus on sucking… and get ready for a big salty load.” She stroked Luna’s starry hair, pressing down firmly on her head. “You got nothing to be angry about, okay? You love having my cock in your mouth… and my cum is your favorite food… and I’m gonna give you a lot.”

“Nnnnmmmgghhh,” groaned Luna, pushing back against Greta’s hand. She struggled weakly at first, but she seemed to grow stronger - and the hair beneath Greta’s talons became darker and colder. Growling, Luna pulled her mouth off of Greta’s cock, pushing her hand away and springing off of the bed.

Luna stood before Greta, her body fighting itself as she glared at the griffon. Greta raised her hands, trying to placate the princess, but there was more than mere anger in Luna’s sudden defiance. Her cutie mark, the pitch-black sky, expanded across her body, bathing it in pitch-black from head to toe. Her horn lengthened, her wings grew sleeker, and her mane spread into a loose, flowing drift of stars. Nightmare Moon had returned.

“Woah,” gasped Greta, standing from the bed. “Chill out, chill out. Holy shit…” he presence of the nightmare tyrant was intimidating to be sure, but Greta couldn’t help but notice that Nightmare Moon’s bust and ass were better than Luna’s. Rounder, thicker, jucier. Whatever magic transformed Luna into her shadow-self, it had also granted her desires for a bigger, more beautiful body.

“We will not chill out, you iniquitous… chimeric… slattern…” grunted Nightmare Moon. “We are the nightmare itself, and you are a beast… devoid of magic…”

“Okay, wow,” said Greta. “First of all, the first part of that? Didn’t understand a word. And the second part… I got enough magic to collar you, princess.”

Nightmare Moon growled, raising her hands to her neck. “This trinket is not a match for one such as I…” her fingers plucked at the collar, unable to get a grip on the metal clasp. “When I am free, I shall reserve the deepest… darkest night for you. Your fate will be a nightmare unending…”

“Looks like you’re having a hard time getting that collar off,” said Greta, approaching the princess. “How about this? I order you not to remove the collar.” Nightmare Moon’s wrists went slack - but she fought her way back to control, and her hands found the collar again. “I command you to look at my big beautiful griffon tits.” Nightmare Moon continued to fumble at the collar, but her eyes stared at Greta’s pert breasts. “I fucking decree that you are imagining what my tit milk tastes like… your mouth is watering…” Greta put her hand underneath one breast, lifting it invitingly. “You’re a ruthless conqueror who takes what she wants, and what you want right now is a taste of my milk.”

“You cannot tell me what to do, mortal…” hissed Nightmare Moon. She opened her mouth, then paused, as if trying to remember something. “You… you will stand still, I command you to stand still while I drink from your breast…”

Greta cackled. “Sure thing, Nightmare Moon,” she said, grinning. “I’ll do whatever you want. You’re a big scary nightmare horse, I don’t wanna risk pissing you off. You just latch onto that little pink nipple and drink your fill, big girl…”

“Yes, I shall,” said Nightmare Moon confidently, kneeling and closing her lips around the tip of Greta’s breast. It had been a long time since Luna had suckled at a breast - longer for her than for most ponies - but it felt natural to lick and suck and feel the first drops of warm, sweet milk hit her tongue. She wrapped her arms around Greta, pulling her closer, and slowly filled her mouth with milk.

“Mmm, it’s good, right?” said Greta, reaching down to stroke the alicorn’s wings. “I think you’re gonna like being my bad little slut. You can be as angry as you want… use as many old-timey insults as you want… but you’ll always do what I tell you to. You’ll be mine forever, Nightmare Moon.”

Nightmare Moon kept suckling for a time, although anger began to show on her face. She swallowed, a lump descending her throat, and then she pulled away from Gilda with a sigh. “Damn you,” she muttered, lowering her head. “Curse you…”

“Mmm, nice,” said Greta. “I can put up with a little anger from my sexy little pet…” She flopped onto the bed, her cock waving back and forth as her body bounced on the mattress. “Feel free to call me whatever dirty names you want, Nightmare Moon… just as long as you hop on my cock.”

Nightmare moon, her face twisted in anger, approached the bed. “You have no right to issue orders to us…” she fumed. “You are beneath one such as I…”

“That’s the idea, babe,” said Greta, grabbing the base of her cock and waggling it mockingly. “I’m beneath you, you get on top and ride my dick.” Still grumbling, but not slowing, Nightmare Moon crawled onto the bed and lifted her hips up above Greta’s cock. “Mmm, that ass is even better now,” said Greta. “You got thick in a hurry when you went all evil.”

Nightmare Moon, now straddling Greta, slammed her pussy down onto the griffon’s shaft, taking the first four inches in one forceful motion. “My physical assets do not require your approval,” she snapped, working her hips lower. “I will… pleasure myself on your member and hopefully you will cease your abuse for a time.”

“Mmmph, maybe,” said Greta. “Ride me hard, babe… but don’t be too rough.”

Grunting in anger, Nightmare Moon worked her hips lower, taking more and more of Greta inside herself. “Rrrgh, you are so damnably thick…” she growled, working her way past the medial ring. “Your cock stretches me so…”

“Ooh, you know how to flatter a girl,” said Greta. “Tell me more about how it feels to have my cock inside you, baby.” She reached up to squeeze Nightmare Moon’s ass, pinching the black, furry cheeks between her talons.

Nightmare Moon scowled, not wishing to flatter Greta - but she couldn’t resist a direct order from the griffon that collared her. “It fills me,” she hissed. “My marehood grows wetter just at the thought of it, and its touch is… ecstacy… I despise you, yet I cannot stop myself from plunging your magnificent cock deeper and deeper into my divine cunt…” She finally hit bottom, taking the last inch of Greta’s cock into her pussy. “Oh, stars above…”

Gasping and whimpering, Nightmare Moon lifted her body and slammed it back down. “I need it,” she moaned, pawing at her tits with desperate, groping fingers. “Your cock, I need it, I cannot stop myself… please, you must… never release me… I cannot live without your cock…” She began to bounce on Greta’s dick, bringing her hips slapping down onto Greta’s pelvis with each bounce of her statuesque body.

“Damn, you’re heavy,” gasped Greta, astonished at how much Nightmare Moon was making her bed bounce. “Those big round tits and that thick ass… that’s a lot of mare… Shit, you’re gonna make me cum, girl.. You want that? You want me to shoot a big griffon load all up in your pony pussy?”

“Yes,” growled Nightmare Moon. “Yes, you vile, worthless creature… release your seed. Breed me, order me to carry your foals, fuck me every night… degrade me until I shriek with rage…”

“Fuck, oh fuck, you are perfect,” moaned Greta. “My big angry fuckdoll, so pissed off about how much she likes gettin’ fucked… hates me... but loves... my dick…” Greta’s body spasmed, and her cock shot its first jet of cum, splattering the thick load against Nightmare Moon’s cervix. “Cum for me,” ordered Greta.

And Nightmare Moon came, her cruel voice crying out, her legs kicking against the mattress. The walls of her pussy milked Greta’s spasming cock, greedily filling her love tunnel with the griffon’s seed. It was the biggest, best climax of the princess’ life, a gift to her body from the collar that controlled her. And when it was over, she fell forward, feeling completely fulfilled but helplessly weak.

“Aw shit,” whispered Greta. “All right, five minutes of cuddling, then we gotta meet Gilda in the courtyard and fly on outta here. She is gonna flip when she sees I collared Nightmare Moon…”