Kobold Test Subject - Chapter 4

Story by Saine on SoFurry

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Hello! This is my last submission for Terinas' Stocking Stuffer 2023 event! Here is the journal on FA: https://www.furaffinity.net/journal/10728053/

The kobold's slave has lived with their master for over a week now and they have fallen into a routine but when their master finished the next potion, how will she react to her newest changes?

This series will contain: Stockholm Syndrome, Pheromones, Transformation, Gender Transformation, Oviposition, Lactation, and other kinks that might not be to everyone's tastes.


I woke again in the bed of my Master. As had become my ritual, I took in a deep breath of his scent before sliding down under our blankets. My gravid belly made things a bit more awkward but I didn't want to miss my opportunity to swallow his cum before the eggs came. Master was hard every morning for me now, it was like his body knew what was coming and happily met my desires. I swallowed his cock into my throat and pressed my nose into his belly to take in his scent from up close.

It had been a little over a week now since I laid my first eggs for him. Laying the eggs had become a much easier process than it had been the first few times. I licked up and down Master's delicious cock while reflecting on how things have changed this past week. The first few days were the hardest, I had been unable to lay the eggs before they stacked up inside me, making the entire process much more difficult. Each time Master fucked my face while I pushed out the last egg to help me lay it. Eventually, I was able to use the memory of that feeling to help me push the eggs out as they came.

...Master had called me a good girl and praised me a lot the first day I was able to lay all three eggs without his help. It was only after the second day that I ate the eggs without needing him to coat them with his cum. I would rather wake him up like this in the morning and follow breakfast with a fuck than mix his cum with my eggs. I had gotten used to their flavor and was perfectly happy to eat them on my own now, my hang-ups for anything Master did to me were quickly falling away. He had stopped calling me human or slave, and pet became rarer by the day. Now I was mainly girl to him and I had already begun to accept it. Just thinking about his praise made my slit flush with arousal, making me more wet for when he eventually used me again.

I sped up now, I didn't have much more time before my eggs would come and I wanted to taste his ambrosia before I laid them. I felt the familiar clawed hands curl themselves in my hair as he started to fuck my face just as I liked. Master was awake now. It didn't take long for my Master to be pushed over the edge and coat my tongue and throat with his flavorful cum. I pulled off his cock just as the eggs began to stir inside me but Master wasn't done with me yet. He pulled my head up and drew me into a kiss, an act he had taken to doing after his morning blowjob. A loving reward for my submission.

When he broke the kiss I slid off the bed and crouched over my laying box just as the first egg slid into my birthing canal. I moaned and closed my eyes at the pleasant feeling of the egg sliding down of its own volition. My first reliable orgasm of the day happened the moment that egg touched my inner opening and I quivered as I relaxed and let it happen. Rather than learning to manage pain as I had first feared, I instead had to learn how to manage the pleasure as I laid my eggs. I licked my lips and imagined Master fucking my face as I clenched and pushed the egg out. Another climax crashed against me as the first egg fell into the soft hay below me. The other two eggs followed and it wasn't long before I was cleaning myself up, I was finally able to make it through the egg laying without passing out from pleasure.

"Good girl, you did well laying your eggs today. Yes," Master said. I felt a flush of heat between my legs at his praise. His words were becoming more clear to me now in the time I had spent with him. What I thought had been broken language was my own ignorance of the subtle nuance in how he spoke. The more he spoke to me the more I came to understand him.

"Thank you, Master."

"Come, let's eat breakfast," he said. He collected my eggs in his small arms and carried them out of the room with a skip in his step. Master seemed to be in a good mood today. He had been struggling with a problem for the last few days but I wasn't able to follow his explanations of alchemy yet.

I followed him into the kitchen where he began to clean the eggs with a dry cloth. After I stopped refusing to eat my eggs, I became curious about how else they could be prepared and so I asked him to show me how the tools in his kitchen work. He complied and cooking together had become a morning ritual of ours as well.

His kitchen had artifacts everywhere, from starting the fire to drawing the water. The first time I had taken a shower I marveled at the strange artifacts that created water from a pipe. Master told me it wasn't quite that simple and that I would understand more as my magic education progressed. For now, I would have to settle for learning how they operate. I started the fire and cracked one of my large eggs onto the metal skillet he had set aside for me.

I had cooked eggs many times over the years, though none as large as the ones from a soralin. It had taken some practice but I showed Master many new ways to prepare them, though they sometimes failed and turned to scrambled eggs anyway. Master's favorite was eggs over easy, the flavor of the yolk seemed to be his favorite. At first, I had been disgusted by them but now the idea that Master enjoyed the taste of my eggs filled me with a pride that I would be loathe to admit.

Two eggs were too much for my Master so we usually split them one to two, his smaller body needed less than I did. He sometimes brought home juices and milk to drink with the food but that seemed rare. We mostly drank water as it was the only thing that was regularly available, to me that was already a marvel. My old nomadic ways had me value water more than my master did. It was hard to fault him for it when his magical pipes carried what seemed like an unlimited supply to him, it was like building your house on top of a stream.

I could smell the scent of my Master's arousal before we had finished eating. Master would usually be interested in fucking me before he started work but he seemed to be especially eager for it this morning. I didn't mind that of course, I was feeling a bit wet between my legs already. Master's spicy aroused scent always made me hungry for him and I was even more ready for it than he was by the time I took our plates to rest in the kitchen's basin.

"Go wait in the Bedroom girl, I need something from my lab."

His words made my insides clench, was he going to fetch a potion? What would the next one do to me? "Yes, Master."

I lay on the bed and spread my legs, my finger trailing along my smooth featureless slit. Master didn't like it when I masturbated, so I kept it to a minimum. Just enough to enflame my passion, not ruin it. Not that I believed I could ruin the mood for myself, Master's collection of potions had made me insatiable. Even with as easy as climaxes came to me, I doubt I would be able to hold myself back if Master ever wanted me. He had nothing to fear from me teasing myself for him.

"Here, girl, new experiment for you to try. Yes?" Master handed me an off-white potion, it was a bit larger than the others had been. I sat up and took the glass vial before taking a sip of it. It tasted like milk mixed with berries, it was thick like a cream and the texture was pleasant. I swallowed the rest and licked my lips before handing the glass vial back to him.

"What will this one do Master?" I knew he wouldn't tell me yet but I could tell he always liked it whenever I showed any curiosity so I chose to indulge him.

"You will find out soon my good girl," he replied with a smile.

The praise made me clench again and I was pleasantly surprised that Master decided to slide between my legs as the changes happened this time. Part of me was relieved that I would still be laying eggs, I had quickly warmed up to my morning ritual. Or at least all of the climaxes that came with it. If he was fucking me, I didn't think it was likely there would be any changes there this time.

I came the moment Master pushed into me. I was plenty slick inside by now and his cock faced no resistance other than my natural stretchiness to enter me in one long thrust. His hands roamed all over my smooth chest. He had been showing a lot of interest in my nipples the last few days but the sensation of him pulling and pinching them was inconsequential compared to the intense pleasure I got from his sharp thrusts.

Because of how my altered anatomy worked between my legs, Master's cock always felt huge inside of me, every thrust stretched me out pleasantly, and I could always feel every vein and crease of his gorgeous cock. My orgasm came and Master moaned on top of me as my vice-like insides squeezed around him. He wasn't close yet but this was only the second of the many orgasms this coupling would give me.

His hands roamed my chest and the touch felt odd, tingly, pleasurable. He squeezed the flesh there and it had more give than it usually did. I may have considered what that might mean if my thoughts weren't blanked out the moment I was brought to another climax. I took in the warm feeling of afterglow as I built to yet another orgasm immediately after.

Master sped up suddenly and before I could tell what prompted this, I felt his mouth around my nipple, the intense pleasure quickly bringing me to another climax. His tongue curling around my nipple felt so good that I couldn't help but wrap my arm around the back of his head and pull him harder against me. He squished against me and it was then that I realized what the new weight on my chest was, the potion he fed me has given me breasts.

I was going to say something but the next part caught me off guard. I suddenly had a cripplingly powerful orgasm that further cascaded into another when Master began to suckle from me. Milk was now coming from my new breasts and Master's suckling mouth and tongue gave me another source of intense pleasure. I had seen women feed their children before and they weren't turned into gasping, moaning wrecks like I was. Every alteration Master did to me gave me a more intense, more pleasurable, more extreme version of whatever that change was.

I felt even more weight pull from my chest and push against Master. He pulled off my nipple and looked down at my chest in confusion. He tentatively reached out and groped an additional breast, pinching the lower nipple and drawing another stream of milk from me.

Master panted. "Un-unexpected result... Girl has four breasts now? What triggered effect?"

I had four breasts now, each heavy and laden with milk. His words made me clench around his cock and draw a loud moan from him, finally pushing him over the edge. I shivered and moaned in pleasure as his cum spilled inside of me. The extreme orgasms I got when he came inside of me have never grown less intense and I was unable to even think as we shared the orgasm.

When I came down from the high I was pleasantly surprised to find my Master humping me again, eager for another. I reached up and explored my new breasts, they felt huge on me but I couldn't tell from this angle how big they actually were. Each breast was capped with a sensitive nipple that gave me a stab of pleasure each time I touched them. It didn't hurt like I had heard some women complain, no, it was an overwhelming pleasure that made my toes curl.

I felt more tingling even lower so I trailed my fingers down to where my hips connected to Master's and found yet another pair of nipples there. They didn't feel as large yet but the skin felt tingly like the others had before they grew to size.

"Ma- Master... There are more nipples down here," I panted out.

My Master huffed and slowed to look down at where I was indicating. "M-more nipples, girl is growing udders too..."

Without any remorse, he reached down and pinched the new nipples making me moan out and arch my back. This only inspired Master to hump me harder and push me to another intense orgasm. I reached up and squeezed two of my new breasts to extend the mind-numbing orgasm even further.

Master leaned forward, took one of my nipples in his mouth, and began to drink my milk again, not even slowing his thrusts. I groaned in hot pleasure when the new udder grew large enough to shake with each thrust. I was covered in sweat and both of us were covered in my milk but that didn't dissuade either of us from continuing our intense coupling.

A small part of me wondered how my Master would react to the messy stains all over his bed but that thought only lived as long as it took me to reach my next orgasm around his thick cock. He reached down and squeezed the longer teats of my new udders and pulled harder than should be comfortable but any possible twinge of pain was completely lost in the overwhelming sea of pleasure I was submerged in.

Before I could recover from my latest climax, he thrust in one last time and began to cum inside me, triggering the intense orgasmic rush that shuts down my mind every time it happens. I shook like I was possessed as I had the strongest orgasm I've ever had, every part of my body contributing to the overflow of pleasure.

When I woke again Master was hugging me still, latched on and nursing the milk from my breast. The fucking had taken a lot out of him too it seemed, he was resting limply against me. His small swallows almost felt as good as sex, more like a slow and relaxed fucking than the rough, raw, and overwhelming session we just finished. Every step of the way Master had tuned my body to become more and more a tool for his pleasure and yet, I would drink another potion if he handed me one without thinking. I was becoming just as addicted to the transformations as I was to his cum or to the sex.

He pulled off my nipple, the cool air making the saliva-slick peak harden. He crawled up and began to kiss me, sharing the flavor of my milk and his tangy saliva. I kissed him passionately, I loved my Master. I loved everything he did to me, all the changes he made to me.

He pulled away from the kiss and whispered into my ear, "Good girl."

His words made me cum.

After we caught our breath, he pulled me from the bed and led me to one of his labs where he pulled a white cloth off of a beautiful reflective surface of glass. It took me a moment to realize that I was looking at myself in the reflection, I had never seen myself so clearly before. Though, obviously, the person who stared back at me looked almost nothing alike to how I had looked not two weeks ago. My body was still muscular but my hips were much wider and my face looked more androgynous and rounded. I might have even still thought my face looked like a young boy's if not for the giant breasts now hanging from my chest that cast a feminine impression over my entire body.

I hefted up my four pairs of tits as they continued to drip bright white milk to the floor. They were large, larger than I had seen on most women. They were rounded and didn't hang very far, the upper pair of breasts sat atop the lower pair creating a second set of cleavage that looked appealing despite how strange it looked. Between my legs was my featureless slit that traveled much too far up between my legs to be normal, hinting at my altered anatomy. Below my belly and above the slit were a pair of puffy udders hanging down. They looked far more animalistic than my breasts, the skin there was ebon black with long nipples, more like the udders of a goat or a horse than that of cattle. They leaked milk at the merest touch and the entire udder was as sensitive as my nipples were, I suspect Master could bring me to orgasm with either of these alone.

Master examined me too, both directly and through the looking-glass. "Hmm, potion's effects much stronger than expected. Supposed to only give pet one pair of milky breasts, same as humans. Result... not unpleasant though, I like. What does Girl think?" he asked.

I hefted up the udders, the strangest part of my new changes. I was conflicted, on one hand, I was beginning to feel more mismatched from my own body, on the other, I had woken up gravid with eggs every morning for the last week and I wouldn't trade away those changes despite how much more extreme they were. What pleasures could these new breasts and udders bring me?

"Would it be hard to reverse?" I asked.

Master nervously rubbed his hands together. "...Yes."

I tweaked my new teats and stifled a moan. "They aren't... unpleasant. I think I can live with them..."

Master smiled and came over to me before lifting up and latching onto one of my udders before swallowing a few gulps of my milk. His stature put him just above waist-tall, making my lower teats nearly the perfect height for him to drink while standing. The sight of him suckling from me through the looking glass made my face flush. I cradled the back of his head as he looked up at me, the sight made me squirm with arousal as waves of pleasure radiated through my teats from his licking tongue. When he pulled off I longed for him to take me back to the room and fuck me yet again.

"Good girl's milk tastes good. Best milk I've ever had. Yes!" His enthusiasm made me happy, another thing that pushed me toward accepting the new changes.

"Wait, another potion!" He turned and began fiddling with his ingredients like a kobold possessed. As I watched him work, his enthusiastic passion for his craft brought a smile to my face. I wished I had passion for something as he had. He poured various liquids into flasks, heated them and caught the vapor, and all sorts of other things I couldn't follow. I didn't have to wait all that long, the kobold seemed to have much of the ingredients prepared from his previous alchemical experiments.

He handed me a small vial and I eyed it carefully.

"New potion good. Make girl... leak less all over my lab..." I followed his gaze along the droplets I'd been tracking all over his workspace. "Potion make breasts stretchy, not spill milk unless expressed, not painful if overly full, just stretch!"

I noticed that he didn't command me to drink it this time, he just watched me as I looked at it. A heat burned between my legs when I looked at the potion, the thought of drinking it alone was making me aroused. This crazy kobold was doing strange things to me in more ways than one.

I smiled as I made up my mind. "It seems we should test it then." I drank down the vial, it tasted like a mix of the last two potions I had, the soralim one and the last milky one.

When I showed Master the empty vial I spied his erection poking out from between his scales again. This time I took the initiative and pulled him back toward the bedroom. He didn't object when I laid him on his back and slowly sat on his cock. I leaned forward and he took the opportunity to pull one of the nipples from my lower set of breasts into his mouth, pushing me further into the haze of heat and pleasure I always had when fucking my Master.

Master didn't get any more work done that day.