Less than a minute after I had cum down the throat of my mother, my cock was already getting stiff again. A man's refractory period comes about from the release of prolactin in the brain. Evolutionary biology's reasoning for it was that semen needed some time to make it to the egg, and further intercourse could instead scoop out all the hard work.
That made sense for a man with only one woman. But as hot as my mother had become, there was no way I was going to be able to stop myself at a single girl. I deserved a harem, and thanks to the dangerous chemical experiment I'd put myself through, my body was changing to be more than capable of satisfying one.
I lifted Helen up off her knees and put her on all fours on the bed, manipulating her as easily as a ragdoll. She let her head rest on the pillow, reached back and spread her asscheeks open with both hands, "Master, are you going to fuck me now?"
I'd always been too busy with my research to think about relationships and sex. Beyond some idle curiosity, I'd never even had time for porn, not when there was so much depth to neurochemistry and its related fields. That is to say I didn't have much experience or knowledge when it came to lovemaking.
That was okay though, I was running on pure instinct, a primal urge to breed.
I slapped my cock in between her cheeks, let it grind against her for a few seconds, then shoved it between her thighs, let it rock against her without penetrating just yet. I could feel her wet slit rubbing against my hard length, hot and slimy with her wetness. The stimulation from the grinding was making her moan like I'd never heard before, wholly unrecognizable from the mother I'd known.
Her body was shivering, her perfect heart-shaped ass pushing back against me, "Please, Master...please...want it so bad...feels so good..."
I gripped her hips in one hand, then used the other to guide in my cock. I fumbled for only a few seconds before I felt her her body yield to me, opening up and accepting my cock. Once the head was inside, the rest followed with a single thrust.
She cried out sharply, and I felt a tinge of guilt with what I had left of my humanity. I wasn't going to stop—the feeling of her velvet walls wrapped around and sucking on me was the best sensation of my entire life, even better than the blowjob she'd just given me—but I didn't want to hurt her any more than necessary, "Do I need to slow down?"
"Nuh-no, Master! It's just...when you forced yourself inside of me, I came. Oh god...I've never cum like that before..." she admitted.
I felt my cock twitch while still buried deep inside of her. That was all the encouragement I needed to stop holding back. I grabbed onto her with both hands, then began to hammer into her with all my strength.
The moans she had made before were mere whispers compared to her reactions now. She was screaming herself hoarse, her voice cracking, begging me for more, "OH yes...Master, use me! Fuck me! Breed me! I'm your slutty sex slave, so just...nnnguuhhh...!!"
Each time I forced an orgasm out of her she'd break down completely, unable to speak beyond the primal grunts, her pussy spasming around my cock. I wasn't restraining myself, but including the first one from the initial penetration, I counted four orgasms before I managed to finish inside of her.
Hot, thick, sticky cum flooded into her womb and a wave of intense relief and satisfaction washed over me. I gave another few pumps before pulling out, then joined her at the head of the bed, lying on my back, fully contented.
My body was, at least. My scientific mind wasn't going to waste this opportunity. I had just administered a non-oral dose of the blue pill formula, it would be good to record its effects.
"Slave, clean me off. Use your tongue," I commanded.
"O-of course, Master. Th-thank you." Her voice was weak and a bit unsteady, her whole body still recovering from the fun I had just had, but she was showing full awareness. When she crawled to the foot of the bed and started running her hot tongue over my balls and working her way up, her movements were fluid and natural, and as she looked up at me worshipfully, I could see a full awareness in her eyes.
"I suppose that means that the changes are complete, and a tolerance has been developed against the tonic immobility side effect."
"Mapherr...?" She said with the head of my cock buried in her mouth, not understanding at all what I was talking about. She'd cleaned off enough of my cum that if it had depended on oral administration, she'd have gone under by now.
I concluded that she no longer went into a trance from contact with the formula, but I wondered if she would still remain suggestible, especially towards the one she had imprinted on.
"Listen to me, slave. Your new name is Elle. In fact, it has always been Elle. You're no longer my mother. Your only identity is that of my obedient sex slave, born into this world just to serve me. Is that clear?"
"Of course, Master! I just hope you'll always find me pleasing enough to keep me as your property." She answered.
That was the experiment, time for the control. I brought out my phone, browsed for a few minutes, then played a video for Helen...no, Elle. Helen had been my mother. No matter how I looked at this gorgeous sexpot, I couldn't recognize her as the same person. She was Elle from this moment on.
The video was a simple advertisement for laundry detergent. One that told the viewer Every home needs Wavy Clean for truly clean clothing.
Once the ad finished playing, I asked, "What do we need for truly clean clothing in this home?"
She smiled, gave a short giggle, "Why me, Master! I just love doing your laundry, cooking your meals...every way to serve you its own unique pleasure! Um...if you want me to switch to Wavy Clean for our detergent, of course I'd throw the detergent we're using out immediately...but that brand hasn't the stain-fighting power of the brand we use, so..."
Interesting. She was still suggestible, but only to the things I had said to her directly. I'd have to watch my words around her...and conduct some further testing.
I snapped a picture of her from the neck up for use later, then said, "Elle, this phone cover is red. That's what I say, but I want you to tell me how it appears to you."
The back of the phone wasn't red though. It was a simple black case.
"Red, Master. The same shade of deep red as that slinky dress I have in my closet. Oh, would you like to see me in it?"
That confirmed it. Her memories, her personality, even her perception of reality all hinged on my will. The power I had over her was...intoxicating.
"Maybe later. For now, how about—"
The sound of the doorbell ringing interrupted me. I glanced at the clock, saw that it was still only 9:30, and went to go and see who it could be at this hour. I was still undressed, but this was my home. And with the new body I had made for myself, I had absolutely nothing to hide.
I opened the door and saw Stephanie. The mousy brunette was dressed in her casual clothes, an oversized black hoodie, black yoga pants, and white sneakers with ankle socks, "I just came here from the campus. I don't think they suspect anything yet but...oh...oh my!"
She quickly covered her eyes with one hand, a fierce blush on her cheeks, "Why are you naked? Have...have you been working out?"
I laughed, pulled her body against me, and gave her a deep kiss, my tongue probing inside her mouth, feeling her melt against me, "After seeing how effective things were on my mother, I decided to run another experiment. On myself this time. Not only did the formula work, but now I'm producing a completely organic version of the formula inside of my body that I can transmit to others."
"Whuh huh...?" She asked, her head rolling on her shoulders, dazed from the kiss. I gave her a few seconds for my words to sink it, and when they did, her eyes popped open wide, "You did what?! But all the trials. The telomere repair sequence would always 'fix' XY chromosomes by transforming them into XX. And the workarounds we tried...those mice always died horribly."
The blue pill formula rejuvenated the human body with a bottom-up approach. Each strand of DNA was restored to the healthiest state possible, and from there the DNA instructed the body to rebuild itself into its most optimal form.
The Y chromosome hardly looked healthy. It was a bare fraction of the size of an X chromosome and only had 3% as many genes. Because of this, the formula would copy over the X chromosome and replace the Y. When this was done to the test mice, the males actually transformed into females. If not for the special inhibitor I'd developed on the 'orange' formula I'd tried last night, it would have happened to me as well.
"It's just like I told you back in the lab. The only reason the mice died was that they were too weak. A stronger organism, say, a human...would have no trouble surviving," I told her. I didn't mention that it really had nearly killed me. No need to worry the girl.
"Oh...okay...but why are you naked?" She circled back to her earlier question.
"I had just finished fucking the brains out of my mother when you rang the doorbell. Do you have a problem with it?" I said with a wolfish, predatory grin.
"Not...not really, no. Your mother though? That's..." First had been the kiss, the revelation about the dangerous human testing I'd gotten up to, and now the incest. I was dropping bombshells on her faster than she could keep up.
"Come on. You didn't come all this way just to tell me we were still in the clear. What really brought you over?" I asked.
"...oh! I may have found another lab. Dynamic Medical. Because of the new FDA regulations, some of their drug line research has had to been frozen, so they have a lot of equipment that's just gathering dust right now. I told them about the project, what we've accomplished so far, and their head of research said to come by for an interview." She was wagging her ass side to side as she delivered the good news, smiling ear to ear like she expected a treat.
Her reward was a rough pat and scratch on the head, "Good girl. That's fantastic news! After last night's experiment, I've only six pills left, and even now we've only just scratched the surface of what's possible on two iterations. When is the meeting scheduled?"
"Um...she said she'd like to see us as soon as possible, so I told her we'd be there by ten."
That earned her a playful swat on her ass, "You should've told me that part sooner! Hold on, I'll get dressed."
Stephanie followed me back to my bedroom. Elle was there waiting, leaning against the headboard of the bed, her legs spread open wide, her fingers slowly pumping in and out of her pussy, "Good morning, Steph! Are you going to join Master's harem too?"
"Am I...? N-no, I don't...I shouldn't..." She looked to me for backup.
"Stephanie has already been serving me well for months. I've already decided I'll be taking care of her," I answered for Stephanie as I wiped the sweat off my body with a towel.
"Wh-wh-what?!" It wasn't the answer Stephanie had been expecting.
"Interpret as you will. I won't do anything to you that you don't ask of me though." I reassured her as I pulled on one of my old white t-shirts, a pair of fresh boxers, and some jeans. With the pounds of flab that had melted from my gut and become muscle elsewhere around my body, the jeans were a bit tight while the shirt was fitting a bit loose, but that just meant I didn't need the belt to go with it. I made a mental note to get some clothes shopping done sooner rather than later.
I took four of the remaining six pills from the metal tray I'd been keeping them on, "I'll be back in a few hours. Have a hot meal waiting for me when I get back."
Elle licked her lips, got onto her feet, "Yes, Master! Have a safe trip, I can't wait to suck your cock under the table when you get back."
