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Slick was nervous. The cabbit had recently figured out she was trans recently, and had been weighing over her options for transitioning when she'd met a self-proclaimed wizard in a bar. He'd given her a killer sales pitch, and managed to sell her a potion that promised to rid her of her pesky manhood, as long as she could find someone else to take it. Her friend Luka immediately sprung to mind, he'd always been into large packages. She thought the German Shepherd would probably be eager to have one for himself, so she'd handed the 'wizard' $200 and been on her merry way.

It was only once she'd already texted him to ask if he would come over that it occurred to her that she may have been taken for a ride. She silently cursed herself, sure the wizard was some kind of silver-tongued con man that had taken advantage of her desperation, but it was too late now, he'd be long gone.

While she waited for her friend, she read the tag on the pink, glowing vial she'd so hastily bought. It stated very simply:

1. Drink entire contents

2. Focus your mind on the image of the one to whom you wish to cast your manhood

That seemed simple enough, so she put the vial back in her pocket and made herself busy while she waited for her friend.

After what felt like hours, she finally heard her doorbell ring and rushed to answer it. She ushered Luka inside and sat him down on her couch, barely contained excitement bubbling up within her.

"Ok, so you know how I came out as trans last month?" she asked

"Yeah, that was very brave," he replied.

"Well, I've been thinking about transitioning, and earlier today I met this guy who said he might have a novel solution for me!"

Luka eyed the cabbit suspiciously, not sure where this was going, but motioned for his friend to continue.

"He sold me this stuff," she said, pulling the vial of potion out of her pocket and handing it to the dog next to her.

"He says it'll get rid of my dick, but that it has to go somewhere, something about magic not being able to break the fundamental laws of physics, but that doesn't matter. I was hoping that "somewhere" might be you."

Luka was floored, he'd always wanted to have more between his legs, and this was probably harmless enough. If it was real, they'd both be getting something they wanted. If it wasn't, it was probably just water and food coloring or something else equally inert.

"Ok," he said, "how's it work?"

"Well, the instructions are pretty simple. It just says to drink it and focus my mind on an image of you, which should be pretty easy with you right in front of me."

As he got off the couch, the dog asked "when do you wanna-" but was interrupted by the sound of a cork being removed from a glass container. Evidently the cabbit was more eager than he thought.

He turned around to see her putting the cork back on the vial, stowing it in her pocket before beginning to strip. He decided to follow suit, figuring it would be cool to watch the changes, assuming there were any at all.

"Ready?" Slick asked eagerly. Luka looked at his crotch, and then at hers. They sported similar equipment. His doggy dick was around 8 inches long, accompanied by some mildly weighty plum-sized nuts. Her slightly smaller, more draconic member was closer to 7 and a half, but her balls were a little larger than his. It hardly mattered, it would all be his soon anyways.

They were both excited, dicks erect, balls throbbing, with pre beading at their tips. As soon as he gave Slick a nod, a pink glow enveloped both their crotches, and Slick's nuts hitched tightly to her crotch and her shaft jerked she began to cum. The spunk didn't so much fire out of her dick as it did flow, carried by the glowing aura towards Luka's pointed tip.

He watched in awe as a ball of freshly fired spooge collected in front of his cock, before a hair thin stream reached out towards his tip and speared in. His knot bloated as he felt himself edging towards orgasm, teetering on the edge as the hair thin stream of cum began to thicken, pushing itself deeper inside him it worked to spread his shaft open. With a grunt, he came, the muscles in his crotch pumping in reverse, drawing the continuous stream of cum out of Slick's crotch and pushing it towards his balls which began to bloat as they grew, stealing his friend's capacity and adding it to his own.

Slick could feel her balls deflating, her sack brushing against her thighs as they withdrew towards her, being drained of everything drop of cum they had to prepare them for their new job as a pair of ovaries. Her thighs thickened as her rear plumped up, her shoulders slimming down as her hips cracked apart and her chest swelled, Adam's apple vanishing from her neck as her body shifted to what, deep down, she had always wanted it to be. Her nipples stood at attention as her areola expanded across her growing breasts. She brought her paws up to massage them, feeling them rapidly grow from mosquito bites into pawfuls, before they began to grow too large to grasp fully with just one paw.

As Slick fondled her breasts, Luka lowered his hands to fondle his growing balls. With every pump of his pelvic muscles, he felt them throb as they swelled with a new wave of cum. He felt a deep heat pulsing within as his growing gonads gurgled, working overtime to convert the Cabbit's seed into his own, more potent brew. His brain was clouding as hormones seeped out of them and into his system, driving his thoughts towards a need to mate, a throbbing ache starting to grow in his balls as their growing size forced them to sag towards his knees, making him spread his legs to give them room to expand.

Slick let her breasts drop, loving the feeling as they bounced on her chest, shifting her shoulders back and forth to watch them sway and jiggle. As the last of her seed was pulled from her balls, they popped inside her, sack melding into a fat, swollen pair of lips between her thighs. As the fluid flowing from her dick began to thin, it turned from opaque white to clear, dick shrinking as a churning began inside her abdomen. As her new womb formed, she felt a tingling between her hips as her new ovaries started to produce eggs, settling into place as her dick began to shift downwards and shrink, beginning its transition into its new role as her clit. She moaned as a wave of feminine hormones washed over her, a deep, warm, and needy ache settling into her womb as her thoughts began to focus on one thing: a need to be filled.

Luka's balls settled into their new size, hanging like a pair of melons between his knees as they throbbed, aching as they sloshed and churned with the massive load being brewed within. With the last of the cum having been deposited into his sack, the fluid carried to him by the magic potion had a new destination: his dick.

He could feel the base of his dick sealed off as the fluid was forced to diffuse into his engorged cock. It expanded in all directions, his growing bitch-breaker rapidly approaching 16 inches in length, his shaft thicker than a soda can with a knot twice as wide. As his dick grew he could feel the pressure from his balls growing behind his dick. With their only outlet sealed off, they began to ache even more, overfilling as their new, ramped up production sought somewhere to go but found no release. He gained some muscle tone as Slick lost hers, a faint 6 pack of abs forming on his torso as his pecs expanded a little, neck thickening as his arms and legs bulked up to support his new equipment.

As the last of her size was transferred to Luka, the tip of Slick's dick sealed off as it settled into place as a throbbing clit, spreading her lips apart slightly as her pussy began to pulse and drip wantingly, the deep ache in her womb shifting into a burning need as new feminine hormones overwhelmed her formerly male body, sending her into a deep heat.

Luka watched eagerly as the last of Slick's manhood settled into his own, groaning as the seal at the base of his dick was finally released. Immediately, several immensely thick volleys of musky precum shot towards Slick, soaking her front and beginning to drip between her thighs, mixing with the fluids from her own drooling slit. She inhaled his addictive scent, eyes blazing with lust as she spread her legs wide, pulling her inflamed lower lips apart and saying, "why don't you come over here and help me break this in?"

Luka didn't need to be asked twice. His dick was still pumping out pre, desperately working to relieve the aching pressure in his overfilled balls. As he walked back over to Slick, he felt his massive gonads swaying between his legs, sloshing and heavy with seed as they bounced pleasurably into his thighs with every step, dick slinging pre everywhere as it bobbed up and down with his movements and the beat of his heart. As he placed his spurting tip at her entrance, Slick could feel his piping hot pre seeping into her, and she moaned as her heat inflamed, demanding she be filled.

She didn't have to wait long. Luka pushed forward slowly, inhaling her heated scent, feeling his friend spread around his monolithic tool as she felt its thickness spear into her.

She moaned out as her fantasies were fulfilled, shivering in pleasure as she felt him sink into her, lubricated by the constant stream of pre firing from his tip and the lube constantly drooling from her own slit, their combined fluids flowing out of her and soaking into the sofa.

The anticipation of what was to come was pulling at both of their minds as Luka finally brought his knot to rest against her entrance, before with one agonizingly long movement, he pulled himself nearly all the way out before he began to thrust back in.

Slick began to cry tears of joy as Luka began to pound her into the couch, breasts bouncing wildly on her chest as she reached up to grab them, squeezing as she felt the need to hold onto something to keep her mind from blanking with pleasure.

Luka felt Slick's tunnel quivering around him as he thrust, his balls sloshing with his seed as they bounced off the couch with every push in, and off his ass with every pull out. Their weight pulled at his sheath with every swing, and he reveled in the sensation of the great mass hanging between his thighs. The aching pressure pulsing deep within them only grew with every impact, their virile contents demanding to be emptied into a warm, wet hole, and he was only too happy to oblige.

Slick could feel Luka beginning to shove himself into her harder and harder, trying to work his swollen knot inside her. She groaned as he pounded it against her clit, feeling a pressure in her hips as it began to spread her open even more. She lowered a paw from her chest to massage her straining button, moaning as she rubbed at its painfully sensitive surface.

The fluids streaming from her crotch were shifting from clear to a translucent white as Luka felt his climax approaching, seed beginning to leech into his pre as the pressure in his swollen orbs became unbearable. Slick's pussy fluttered around him as he made one final, powerful shove into her, knot straining against her clit as they both teetered on the edge of orgasm. In desperation, Slick wrapped her legs around his hips to help him tie her, needing to be seeded as much as the dog needed to seed, until, with an agonizingly pleasurable (and alarmingly loud) squelching pop, they locked together.

Luka's balls were yanked up to his crotch as they visibly contracted, forcing a powerful shot of virile seed through his shaft as he began to cum.

Slick felt his spunk spear into her as she went over the edge, waves of pleasure washing over her as she convulsed around Luka's shaft. It throbbed violently inside her with every massive shot of cum, her womb screaming with joy as it bloated due to the sheer amount of spooge being crammed into it. The entire world faded from her comprehension with the exception of her nethers, feeling each blindingly pleasurable pulse of sensation blitz through her with every shot of seed Luka's wildly seizing balls shoved into her.

Luka's mind was similarly occupied, overcome with sensations more intense than he had ever experienced before. He could feel every bolt of spunk as it was squeezed from his balls and propelled through his ducts, before joining its brethren and being pumped up his throbbing shaft, until finally it fired from his tingling tip with an intensely gratifying pulse. He could feel his body working harder and harder to overcome the pressure building within Slick, until finally, it proved too much for both of them.

Slick cried out as Luka's knot ground slowly against her thrumming clit, forced back out of her by the pressure of the immense amounts of spunk that had been shoved into her by Luka's potent equipment. With a pop, his knot slipped out of her as her clenching pussy pushed out a wave of their combined fluids, utterly soaking both of their crotches and giving the couch a stain that would never wash out.

Her tunnel continued spasming around Luka's shaft as he pulled out of her, stroking his still firing dick as he pointed it at her chest, frosting it with his virile loads as leftovers continued gushing out of her slit. Slick opened her mouth to catch some of the spunk, licking her lips as she savored the musky, salty flavor. Luka grasped his knot with one hand as he gave his shaft one last pump, milking the final shot of spooge from his cock as it began to droop a bit, both it and Slick's pussy now drooling out the last of his cum.

Slick lowered her legs to the ground as Luka dropped onto the sopping wet couch beside her, both of them basking in the most powerful afterglow they'd ever felt. After a few moments, their brains kicked back into life as they gazed down at their new forms.

Slick weighed her sizable new breasts as Luka looked at his own larger chest. In taking her manhood, he'd also gained her masculinity, evidently. Their attention soon shifted lower, as he examined his much larger tool, Slick slipped a finger inside her slit. She moaned at the sensation, feeling the embers of warmth flare slightly within her before withdrawing the now dripping digit. As Luka moved a paw to massage his massive testes, he felt them rumbling, already churning up a fresh load.

Slick, meanwhile, could feel fresh lube soaking into her thighs as she saw Luka's flagging dick start to rise again. As she moved her dripping finger in front of his nose, he was forced to smell her heat. He felt that deep, throbbing ache that demanded satisfaction seeping into his balls as she turned to face him, spreading herself open, asking, "Are you ready for round 2?"