"Now remember Luna, you have to be quick with the belladonna juice, this is a very sensitive potion as you well know" Hermione reminded her blonde friend for the fifteen time that night, though being fair to the curly hair Gryffindor the two had been brewing this particular potion for three weeks at this point.

"Sure thing Mione" Luna said humming a little tone as she twisted the plant in question on the brewing table, the growth enhancement potion if done correctly could be used to make a Dragon reach maturity much quicker, even Snape with his bias against any house that didn't have a snake would have to give the two girls some incredible marks if they managed to pull off the notoriously hard potion without any mistakes.

Of course, unbeknownst to the two beautiful girls currently stirring a cauldron without a care in the world a third figure was currently watching them with great interest. Daphne Greengrass had a smug smirk on her face, she had caught notice of the two girls using this brewing room, in particular, every other night from Pansy, who got it from Draco who got it from Snape himself. She couldn't call herself a Slytherin if she didn't take advantage of such a situation, Granger was a pain in her ass always being a teacher's pet and bookworm, and messing with Looney Lovegood was just fun.

Checking on one of her robe's pockets while keeping a close look to make sure that neither girl had noticed her yet Daphne's smirk grew as she pulled a tiny bottle filled with a creamy white liquid, Veela's milk one of the most reactive potion ingredients known to wizardkind. Combined with the girl's brewing such a complex potion her next 'prank' would be interesting indeed.

Casting a levitation charm on the tiny bottle filled with white gold (it cost Daphne a considerable portion of her allowance) The blonde did her best to keep her giggled in place as she made it hover into the brewing room and over the oblivious sluts' heads, almost fumbling the bag as she let it drop hitting Granger on top of the head before bouncing into the bubbling cauldron.

"OW! W-What was that?" Hermione asked only hearing a gasp from Luna, turning to the cauldron her face turned pale as the copper potion holder started practically growling shaking out of control in what had to be an imminent explosion!

"Oh, no-" Was all Luna managed to get out before the potion exploded with a wet bang, thankfully not doing any damage beyond splashing the fronts of both girls with the sabotaged potion, as well as releasing some fumes that they accidentally ended up breathing in a bit before thinking to cover their mouths and noses until the cloud dissipated.

"Wh-what happened…?" Hermione asked, groaning through her coughing from the fumes, "I felt something hit my head, and then I think I heard something splash into the potion…"

"It wasn't me…" Luna said through her own coughing, "I didn't get the chance to add the next ingredient before whatever that was fell in…"

"Well, nothing we can do about it now…" Hermione sighed, grimacing as she looked at the remains of their potion, and their soaked robes, "Come on, we better hurry up and clean ourselves off before we suffer some sort of adverse effects, maybe if we're quick about it we can salvage this and still finish the potion in time…"

"I… I'm coming, just…" Luna started to follow, taking a few shaky steps, "Just… my head feels a bit odd…" She pressed a hand to her forehead.

"C-come to think of it, I-I'm feeling a little dizzy myself…" Hermione blinked, swaying slightly as it occurred to her that it felt like a fog was settling over her mind.

From where she was watching, Daphne smirked as she prepared to enjoy the real show~

"S-Somethings wrong Luna, let me cast a diagnostic chaaaaaaaaarm ~" Hermione started speaking before her last sentence turned a long and loud moan making her eyes widen as she felt a pressure start building in her chest.

"H-Hermione are you alriiiiiiiiiight~" Luna started before mewling just like her friend. Both girls were wearing the Hogwarts robes unbuttoned meaning that Daphne got to see quite clearly as a button on Luna's white shirt went flying over the room with a pop.

"W-Whats happening~" Hermione said with another loud moan hearing the sounds of her own shirt being slowly destroyed as the fog inside her head grew unbelievably heavy it was hard to even think let alone understand what was happening to her.

Daphne's eyes widened hearing herself gasp as she noticed the lewd sight in front of her, it was at the same time teasingly slow and incredibly fast. Loney Lovegood went from being almost flat to having tits the size of Susan Bones in just a few seconds with no sign of it stopping, looking at Granger showed that her chest was similarly expanding.

The Slytherin girl giggled loudly, unable to control herself or the twitching under her skirt.

"My head hurtie" Luna whined "Thinking hard~" The blonde girl held a hand to her forehead and one to her growing tits both feeling like they were on fire for different reasons.

Of course, none of the three girls could have foreseen that Luna and Hermione's considerably above average intellect just meant that the failed potion had more to draw upon, the two witches not even realizing that with each second that passed more and more of their hard-earned knowledge and natural intellect was getting drained straight down, making their tits balloon in size and ripping their shirts and flimsy bras to shred in less than a minute.

Even from here Daphne could see wet spots forming on the tips of each girl's now massive tits, their moaning being incredibly loud as they drooled all over themselves.

"Big boobies…~!" Hermione giggled stupidly, staring at Luna's swelling chest while drooling onto her own still-growing tits as her shirt was torn open, the wet spots on whatever was still covering her nipples slowly getting darker and darker, "I want my boobies big too…~! Bigger than yours~! Much, much… Muh… Muh…~"

"You do have big boobies~!" Luna tittered right back, the idiotic grin on her face making it clear she didn't care at all that her own shirt was about to become torn beyond repair, "I hope both our boobies get bigger, Mion… Mio… Muh… Muh…~"

"That's it… let's hear it, nice and slutty, full of blissful stupidity…~!" Daphne whispered lustfully, pawing a bulge forming in her robes at her crotch.

"Muh… Muh…~!" Hermione's face screwed up as if concentrating on still trying to speak, her tits having momentarily halted their growth, but were still visibly quivering.

"Muh… Muh… Muh-Muh-Muh…~!" Luna was in the same boat, her massive tits jiggling and quivering, almost as if she was somehow holding back their expansion.

But of course, there was no stopping what was happening to these two, and sure enough, the last of their IQ was sent right to those abundant chests of theirs, Daphne even swearing she could hear the last of their brain cells pop as their fates were sealed~

"MMOOOOOoooooooOOOOOOO~!" Both girls howled in moronic bliss as their tits, no, udders proceeded to bwompf out with one last explosive burst of growth, both sets of sloshing Milkers bouncing and wobbling obscenely while gushing milk onto the floor and each other~

Daphne could barely understand the sight in front of her, her mind (the only working one near the room) working fast to comprehend what happened. After some time to think the results were clear. Mixing a growth enhancement potion with Veela milk had the side effect of making the two girls grow tits of an amazing size that were completely filled with sweet smelling milk!

Her intellectual side satisfied the horny side of the Slytherin girl took hold, giggling as she fished out her member, letting her grey skirt fall to the ground with lustful haste, her green and hold panties barely holding back her rock hard cock which almost jumped out as she pulled it out. Being one of the hungest futas in Slytherin meant that Daphne's 'anaconda' stood at an impressive 10 inches in length her balls being similarly plump and big.

Turning her sight to the two newly turned bimbos Daphne bit down a moan as she saw what they were doing.

"Mhm~ Milkies" Hermione mewled as moved one hand to Luna's chest, both girls had tits big enough to reach their waists and Hermione's hand was way too small to really cup the titflesh though her fingers did sink into the soft udders.

"MMMOOOooooo~" Luna 'said' her nipples spurting a little extra milk as her left breast was groped, clearly not having the brainpower to do much more than reciprocate her own moving her hand to Hermione's left tit and groping it roughly.

Hermione moaned like a complete whore, Daphne wasn't even sure if the curly brunette had actually cum from just getting her tits groped, it wouldn't be the weirdest thing to happen. Deciding to take a wait-and-see approach Daphne started stroking her hard cock while watching the sexy show of two cows going at it.

"Mhm sooooo thirsty-mooo~" Luna said with a stupid grin and eyes that had absolutely no complex thoughts behind them, the blonde girl seemed to fall forward her face bouncing against Hermione's new and improved funbags, the udders wobbling and jiggling from the weight of the Ravenclaw's head.

"AAAAAAHHHHHhhhhh~" Hermione basically shrieked as the blonde's lips latched onto one of her brown nipples and give a loud SUCC, throwing her head back and now obviously having an orgasm as the blonde started greedily drinking from her milk containers without a care in the world.

"Mmmmf~ Mmmmph~" Luna greedily sucked down that sweet, creamy dairy, making her even dumber and hornier, the same effect having her nipple sucked was having on Hermione~

"Moo-Moo Milkies~" Hermione panted and moaned as she composed herself enough to grab one of Luna's own leaking udders and heft it up to her mouth before latching onto the nipple and suck away~

"Mmmmmmmm~!" Luna moaned as she now experienced the dual pleasure of gulping down Hermione's milkshake-thick milk and having her own sensitive nub sucked and flicked with a tongue.

"Mmmmmmmm~!" Hermione moaned right back as she quickly got addicted to the taste of her fellow cow's milk, both of them somehow even getting even dumber from this mutual milking~

"That's it, you stupid, slutty cows~" Daphne breathed out a moan as she continued stroking her shaft as she watched the depravity in front of her, the sight so arousing her balls were already starting to twitch in preparation for orgasm~

Their brains being too slow to notice the Slytherin girl panting and moaning as she stroked her member, Hermione and Luna continued playing with each other cheeks sunk as they gulped as much milk into their stomach as they could, the magical milk making their tongues tingle pleasantly the taste making them hornier beyond reason.

Hermione gave muffled 'moos' and moans, her tongue swirling around Luna's hard pink nipple as one of her hands shakily moved to the cow tit she wasn't drinking from. Luna's tits were so big that her arm actually shook as she massaged it, the weight of all the fat and milk making it a struggle to play with, though the touching got a lot of Luna's approval, the blonde who was usually called an air head and was now something beyond that almost biting down on the nipple between her lips as Hermione reflexively pinched her right nipple.

Daphne continued pumping her shaft, this result had gone beyond even her craziest expectation and the two cow sluts were hot enough that she ignored any common sense just pleasuring herself while keeping constant watch of the two bimbos. She could already imagine all the fun she would have with these two milk-for-brains sluts, fucking those fat udders was an obvious start but there was much more she could do~

"Mhm! I bet I could even put these two to work~ Oh~ Yesss~ All the futas on Slytherin would pay me a lot to get just Loney Lovegood but they would do anything to fuck Granger's tits. Maybe I can get an older student to put them in a wall, the ditzy bimbos would probably love that, having their tits be cumdumps for the entirety of Hogwarts!" Daphne said with a high pitched moan as the final fantasy finally made her reach her peak.

Balls churning and clenching Daphne imagined painting those giant sized breast white with her own creamy sauce, marking them as if she owned them.

SPURT~ SPURT~ SPURT

"Yessss! I own these sluts~ I made them so the least they could do is become my own personal witch cows!" Daphne said sounding slightly delirious as she blew her load into the cold Hogwart's stone.

"Mmm…~?" The sound of Daphne's words, along with the sound of her cum splattering on the floor, managed to attract the attention of both cows.

"Oh, you've seen me~" Daphne noticed, "No matter, not like you can do anything about it~" She sauntered over, letting her still hard cock swing in a way that clearly appealed to the pair of brainless sluts before her.

"In any case, I think it's appropriate that I get to use you two first, I do own you now~" She took a seat in an empty chair and gestured to her shaft, "Put your udders to use~" She told them.

"Moooooo~!" Both cows mooed eagerly, letting each other's nipples fall from their mouths as they crawled over on all fours, their udders hanging and swinging lewdly, even dragging on the floor a bit and making them moan as their leaking nubs rubbed on the cold stone below.

"That's it, no need for thinking or speaking, just moo like the Cowsluts you are~" Daphne told them smugly as she watched in eager anticipation as they prepared to smother her shaft in titflesh.

Too bad it hadn't occurred to the Slytherin to make sure that they didn't have any potion left on them~

Luna and Hermione moved together in a surprisingly synchronized motion kneeling at either side of Daphne, Hermione on her left and Luna on her right, clearly choosing this position to make sure every inch of Daphne's cock was in contact with their udders. It was an impressive showing in Daphne's mind, considering that their IQ was the same as the temperature in the room.

"Ah~ Morgana's tits that's it!" Daphne mewled as the two cow sluts pushed those massive milky tits against her shaft, smooshing it in a way that had the blonde's toes curling in pleasure, even with her remarkable size the two bimbos were packing enough titflesh to completely hide Daphne's snake.

Daphne sighed in satisfaction as the two girls started clumsily rubbing their leaking breasts against her cock, not only did it feel amazing but knowing who was doing it just made it better~

"I think I know what I'm going to do with you two~ I'm going to use your tits like pillows when I go to sleep and bust a few loads inside your creamy tits when I wake up!" Daphne smugly said with a high-pitched giggle, completely certain that she would never have to suffer through a morning wood ever again. Sure training these braindead sluts would be a challenge but teaching them that Daphne's hard cock should be worshipped shouldn't be that hard~

The two cow's boobjob increased with speed as their milk leaked and worked as lube, it was an incredible sensation that had Daphne's thoughts growing hazy.

"Mhm~ Good silly pets~" She mewled absentmindedly patting the two cows' heads as one would a dumb puppy.

"Moooooo~" They both responded stupidly, focusing only on giving the double titfuck that completely smothered Daphne's cock.

"That's right, the cows go moo~" Daphne chuckled, oblivious to the way her nuts were starting to audibly churn and gurgle as they swelled bigger and bigger with fresh cum

"Mooooooooo~!" Hermione and Luna sped up the titfuck, loving how the Slytherin's throbbing cock felt between their udders, not thinking anything of how they felt her balls getting fatter and fuller underneath the sloshing milkers.

"Mmmmmph~ How are you two so good at this despite being such idiots now~?" Daphne mused out loud with a hum, vaguely noticing her balls rumbling and feeling especially good, like they were stuffed with more cum to pump out than she ever had in her life.

Daphne completely unaware that her cock was being lubed by more than just milk and precum was blissfully unaware as not only her balls grew in size but also her cock though the growth was noticeably slower there.

"Mhm~?" Daphne hummed in confusion, it was hard to think with two A-grade cows giving her such incredible treatment, but even with her mind hazy and bombarded with unbelievable pleasure she was still aware enough to notice the tip of her cock now starting to poke in between the two cow sluts tits.

"Moooooooo~!" Luna was clearly happy with the development giving the tip of the cock a big lewd smooch that had Daphne throwing her head back, especially once Hermione joined up making Daphne close her eyes in pleasure.

If she hadn't closed them she would have maybe noticed that the precum slowly spurting out of her cockhead was much thicker and creamier than usual almost to the level of her regular loads.

So distracted was she by the pleasure that the blonde only realize something may be wrong when the chair she had been sitting on started to creak from the strain of holding not only the weight of a pair of udders but now also Daphne's cum factories which had reached the size of her head!

"W-wait, what!?" She started as she did her best to worm her hands underneath and feeling her rumbling, churning cumtanks, "Ooooooooohh~! Oh, no~! What happened~!?" She moaned as her fingers sank into those balls she could feel growing under her hands, already reaching the point that each individual nut was bigger than her own head~!

"Moooooooo~" Hermione lightly bumped Luna's head, nudging her out of the way so that she could get at Daphne's cockhead as well and give it some licks and kisses.

"Oooooooooogghh~!" Daphne moaned in a very unbecoming way, the increased sensitivity of her shaft and tip still enough to make her head spin, even if, again, it wasn't to the same extent as her balls, "S-stop, you stupid cows…~!" She demanded

"I-I need to stop this…~! You're going to make it worse if you keep going…~!" She snapped at both of them, failing to realize that with the state they were in, they wouldn't listen to her due to how horny they were.

"Moooooooo~!" Hermione and Luna moaned together as Daphne's cock had grown to the point they could both swirl their tongues around her throbbing, drooling cockhead~

"N-Noooooooo…~!" Daphne moaned reluctantly as the tag team assault on her sensitive cocktip only served to make her cumtanks rumble, gurgle and growl even louder as they started growing even more quickly, now fully spilling over the edge of her seat~

The blonde tried to push the two bimbos off her cock but having tasted Daphne's magically enhanced cum the two cows were completely hooked and hopelessly addicted, their lips stayed latched on the engorged tip and the Slytherin girl simply couldn't muster the strength to push off to cum thirsty bimbos while also dealing with the pleasure.

If before her cock could have been compared to an anaconda now the only creature that would compare was a fully grown Basilisk, the sheer size, girth, and cum production being far more than anything a regular witch could ever produce.

"Y-You cow whores~ Don't s-suck so harddddd!" Daphne growled even as her body started instinctually thrusting against both pairs of udders, the sheer quantity of cum on her cumtanks, which were quickly approaching the two girls' tits in size, demanded Daphne find release.

The only reason that Daphne hadn't busted her load already was that the two braindead witch cows were fighting each other slightly instead of working together, pushing the other off the leaking cockhead once they believed it was their turn. Currently, Luna's cheeks were sunk as she drank enough thick precum to have some leaking from her nostrils.

Daphne was worried, she somehow maintained most of her mental faculties, which was good, but she was also close to cumming, and she wasn't sure what that would mean for her mind, what if she came all of her smarts out in one huge load!? She would become no better than the two cows milking her! A cum cow who gets her nuts milked instead of her tits!

"I said stoooooooop~!" She cried as she got a burst of desperate strength and managed to push Luna off her cocktip, breathing a sigh of relief that she had bought herself some time.

"Mooooooooo…~!" Only for the two cows to be frustrated by her resistance and responded by giving her an even more vigorous titfuck, making her cumtanks truly growl and churn as they finally bloated so big that they were the same size as the udders about to doom her with her next orgasm~!

"NNOOOOOOOOOOO~!" Daphne howled in equal parts despair and reluctant ecstasy as pleasure rocked her body, her immense cumtanks rumbling and churning before giving a mighty CLENCH and…~

SSSPPPUUUUUUUUUUUURRRTTT~

"No, NO, NNOOOOOOO- OOOOOOOooooooOOOOOOGGHH~!" Daphne's cry of despair morphed into a moan as her expressions twisted into an idiotic ahegao that put the stupid faces on Hermione and Luna to shame, her tongue spilling out as she went cross-eyed while her cock sprayed gallons upon gallons of thick spunk into the air, almost reaching the ceiling before gravity took hold once more and rained those thick gobs of cum onto the floor and the tops of those udders surrounding her cock~

"MOOOOOOOoooooo~!" The two cows cheered as the ultra-thick spunk fell down on them, their tongues lolling out as they hoped some of the smelly, custard thick strands of nut batter fell on them. Due to their sheer size most of the load painted their huge udders but some of it did fall on the girls' open mouths getting them to moan in satisfaction at the delicious taste.

Daphne of course was too body with her mind breaking orgasm the now weaker load was shooting out of her tip before falling down to the two cows' combined cleavage. Hermione and Luna seeing their stud's cock get dirty didn't hesitate to try to clean the shaft with their tongues.

"Cummies~! Balls feel shooo goood~!" Daphne said with a moronic smile, having truly shot all of her cunning mind and accumulated knowledge out of her cock what was once a smart mind was now being used to paint two cows white, the steady stream of thick cum covering Hermione and Luna's face as well as their tits.

Almost without thinking Daphne let her weight fall on Hermione, making the cow yelp as her back hit the ground, of course, that quickly turned to loud moaning as Daphne hugged her udders and start fucking the tits with all her brain drained mind could muster.

Luna pouted with a whinny 'moo' hugging Daphne's back and pressing her cum glazed tits against the Slytherin girl, Daphne turned her head and started sucking on her fellow blonde's tits with wild abandon.

"Moooooooooo~!" The two cows moaned and if Daphne hadn't had a fat, leaking nipple in her mouth she would have joined them.

(3 hours later)

"Yes Gabby I'm certain that they are here as if I could miss such a delectable aroma" Fleur Delacour stated as she walked imperiously through the castle's halls her heels clicking as she walked at a brisk pace. The Veela had the body of a complete slut, extremely curvaceous and all around built for sex.

Her younger sister Gabrielle Delacour practically skipped happy to have been allowed into the castle, her nose twitching as she tracked a sweet scent that reminded her of her mother. Unlike her sister Gabby had a notably top heavy build which combined with her much smaller height made most people call her a shortstack.

Finally turning at the door of her destination, Fleur licked her lips as she walked inside the brewing room without a care of the room, getting blasted by the delicious smell, of sweat, cum, milk, and sex.

"Oh my~" The older Veela murmured as she watched events unfold, a blonde girl with tits to rival her mother was getting said udders fucked against the wall her hands held up as one of the biggest cocks Fleur had ever seen made those milky tits jiggle like crazy. A second girl with brown hair had her face planted on what were actually the biggest pairs of balls the french girl had ever seen, kissing, licking, and slobbering on the massive cumtanks with wild abandon.

The entirety of the brewing room was covered with cum and milk, the three girls even more so.

"MOOOOoooooooo~!" The three stacked girls basically howled getting a very big smile on Fleur's face, this was even better than she had been expecting~

"Oh, my…~!" Gabby gasped, grinning as she got a bulge even bigger than Daphne's, "Those two busty cows look so good I want to take them home~!"

"And take them home we shall~" Fleur agreed, licking her lips as she watched Daphne's cock drool out such thick cum, the plump nipples on her huge, pornstar tits getting hard, and those balls… ~!

"Mooooooooo~" The three cows didn't really understand what the two girls in front of them were saying, but they seemed really sexy, so it couldn't be all that bad.

"I can't wait to taste their milk~" Gabby cooed as she walked over and petted Hermione and Luna on their heads.

"This one's cum will do wonders for my skin, and I'm sure it'll taste amazing as well~" Fleur hummed as she palmed one of Daphne's immense, gurgling cumtanks

(Sometime later in France)

"You know I never cared to learn your name, but you're an amazing cumdispensor~" Fleur purred as she skillfully jerked the blonde girl she had stolen from Hogwarts after the silly tournament had ended, only the girl's cock and balls could be seen, in all their incredible size, a framed picture of said blonde was on top of the hole she had been stuck into with magic, a shameful ahegao~

"I don't even need to get up to get delicious cum anymore, you're the best sex toy a Veela could ask for~" Of course Fleur wasn't too greedy, letting not only her mother but all of her Veela friends get a taste of her newest toy. They were all so jealous that Fleur got such a studly cock on the wall of her room to suck whenever she wanted.

Needless to say, Daphne was also an incredible dildo one that gave Fleur more than one creamy feeling that had the Veela looking months pregnant, she was lucky that the cleaning charm worked on the dildo's cum otherwise cleanup would be quite messy.

"Don't worry my cute little sextoy, even if it takes ten Veela's working together I will make sure to drain those gigantic nut factories of yours, even if I like the sound of you fat nuts churning in the background~" Fleur promised seconds before Daphne came, the former student's orgasmic expression being hidden by the wall as she bathed the Veela with her loads that had only gotten thicker and bigger since she first got brain drained.

Fleur smiled and moaned as she got coated completely white like a cake with white frosting, she loved her toy and her musky balls~

Meanwhile, in Gabby's room, she had finished guzzling down as much milk as she could, and was now working to empty her stuffed nuts into the cleavage of one of her cows, the brunette one, as evidenced by the picture above them depicting the cow with her moronic ahegao.

"Your udders feel so good~" The young girl moaned as she humped away, "Your milk always gets my balls so full of cum, and my cum makes your udders so plush and soft to fuck~ We help each other so well~" She told her cows, not caring that they couldn't hear or understand her.

Oh well, not like she really knew either of them anyway, that made it even easier to use their udders as her personal sextoys~!

"Hope you're ready, I'm really backed up today~" Gabby moaned as she started thrusting her hips even harder, her heavy, bloated nuts smacking against those udders and making them ripple and slosh even more, already rumbling in preparation for orgasm~

The only response she got was the muffled moaning and mooing of the brunette cow.

"But of course… don't think I'll be neglecting you…~!" Gabby glanced over at the other set of udders sticking out of her bedroom wall, belonging to the blonde one, also with a picture above them depicting her expression of stupid pleasure, "I'll need both of you to help me empty my big, fat balls…~!" She moaned as she felt her nuts clench, her cock spurting out the first of many loads she'd be pumping into the cleavage of these Cowsluts today~