Knicker Knight
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Growth Spurt Chapter 79
🕑 Added 2025-07-25 23:32:35 +0000 UTCHarry tried to get up when he saw Madame Croaker coming.
The pink smoke made his head swim and kept him seated. The lust he was experiencing was so overwhelming that he couldn’t even move properly. Feeling a sudden urge, he almost leaped onto Hermione’s unconscious form.
“None of that,” Madame Croaker said. “She’s already fulfilled her role. There will be no wasting precious seed in an experiment under my supervision.”
She swung her legs over Harry’s hips and trapped him underneath her fat ass. Harry’s dick poked her entrance, but Madame Croaker’s expression didn’t change at all. A useless thought went through Harry’s head: if she was this pretty, it was a shame how often she stayed covered up.
“First contact with the member has been initiated,” Madame Croaker said, grabbing Harry’s dick with both of her dainty hands. “Now beginning penetration.”
She squatted on top of Harry, bending her knees. Croaker pointed Harry’s dick up and dropped her pussy onto it. Her ass clapped into Harry’s thighs. He gasped, starting to pant. The smoke surrounding them enhanced the pleasure beyond what was normal.
That was really saying something, because Madame Croaker was incredible at this.
“Unexpected girth has been noted,” Croaker said. “Length exceeds expectations as well. The womb’s response is more eager than expected. I am now picking up the pace.”
She repeatedly slut dropped on Harry’s dick like a stripper with decades of experience, talking clinically the entire time. Her voice wasn’t even trembling. Harry could barely hear her breathing a little bit hard.
“First orgasm has occurred,” she said. Harry could feel her essence washing over his dick as her folds tightened. “All variables are proceeding as planned. Remain attentive.”
“What… Is this experiment?” Harry gasped.
Talking was hard, so he barely got the words out.
Croaker leaned her head to the side and looked at him, her straw colored hair hanging down to the side of her head.
“The unspeakables are responsible for deepening the ministry’s knowledge of magic in areas no one else would dare to approach,” Madame Croaker said, her ass clapping the whole time. “We study death. Love. The brain. Time. Forces at the edge of what magic can transmute; forces that could cause extreme damage if handled improperly. Our most recent fascination is with birth.”
“Birth?” Harry gasped.
“Where does life come from?” Madame Croaker said. “Recently, we have hypothesized that the answer is: magic. What I say from now on is our working theory. When a man’s semen reaches his lover’s egg, a magical reaction occurs not unlike a spell. Even in nature, we think that ordinary animals and non-magical humans muster magic in this specific instance. However, for this to actually be proven, we need to observe the process with the right equipment.”
Harry groaned. Madame Croaker was taking a no nonsense approach to making him cum, but he was trying to hold on. He wanted to hear this explanation, and if he didn’t get it out of her now he had a feeling he would never hear this explained.
“Then Hermione and I…?” Harry said.
“You impregnated her.” Madame Croaker said it like it was nothing. “We used very specifically attuned devices to measure the results… however, one was too small of a sample size. Instead of missing our opportunity, I personally stepped in.”
“To get knocked up?” Harry asked.
“For science,” Madame Croaker said.
She leaned forward and put her hands on Harry’s chest to balance her weight, starting to throw her ass up and down so hard that the bed shook. Hermione mumbled something in her sleep. Harry’s cum was dripping out of her pussy. When he saw that, Harry got so turned on that he almost came inside of Madame Croaker. He caught himself.
“Don’t be stubborn,” Madame Croaker said. “This experiment requires your semen. There’s no reason to drag this out.”
She knew that he was delaying his orgasm. Harry’s head spun, disoriented by pleasure and… LUST.
He’d been feeling this lust for a while, but right now, it was coming to life in a new way. It felt unquenchable. He was balls deep in a gorgeous beauty who was riding him… and it wasn’t enough.
Whatever was in this smoke, it was perfect evidence of the unspeakables’ ingenuity. It had so many functions: vanishing clothes, nullifying birth control potions, and being an aphrodisiac. But that last function…
It did more than make Harry horny. It was getting him so worked up that he couldn’t handle it, like a fire that was impervious to water.
The only way for him to feel okay now was to fan the flames.
“In this experiment, all that matters is that you get knocked up, right?” Harry asked.
“That is an acceptable understanding,” Madame Croaker said. “Indeed, giving your seed is your only role within this. So cease resisting!”
She yelped, her smooth and deep voice getting higher pitched as Harry flipped both of them over. She got stuck underneath him. Her eyes widened a little bit, showing the most human emotion Harry had seen from her yet.
“This is disruptive!” Madame Croaker exclaimed. “Our prior position was perfectly suited to do things in the most efficient manner possible—UGH!”
Harry’s first thrust from on top of her struck her deeper than she’d been penetrated while riding him. Madame Croaker’s eyes bulged out and her pink tongue stuck out. Despite her best efforts, she started to audibly moan as Harry fucked her cunt.
“Ah!” “Ah!” “Ah!”
Her hands went up to his chest, at first trying to push him away. As soon as they touched Harry’s body, they became preoccupied with groping his muscles. Madame Croaker’s inquisitive scientific mind busied itself with memorizing the feeling of his pecs.
Harry wondered if there was also some kind of magical steroid mixed into the pink fog surrounding them. His body was performing even better than it usually did. His hips slammed into Madame Croaker over and over again.
PLAP! PLAP! PLAP!
“Girth… Size… Speed… They’re— They’re off the charts!” Madame Croaker gasped.
“Do you like it, Madame?” Harry asked.
“Ir-Irrelevant,” she said.
“Tell me,” Harry ordered.
Tears formed in the corner of her eyes from the utter pleasure that was seeping throughout her body.
“I looooove it…” she moaned.
Harry grinned. He grabbed her face with his hand and squeezed her cheeks. Madame Croaker’s tongue stuck out further as he did so.
“What’s your real name?” he asked.
“Dats a schecurity breatch,” Madame Croaker said. She was slurring from the way Harry was holding her.
Harry leaned right down into her face, pounding her the whole time.
“If my kid is going to be making your belly bulge, I’m not calling you Madame,” Harry said. “We need to be on a first name basis. Tell me, and I’ll finally knock you up.”
He let go of her cheeks just enough for her to answer normally.
“Sarah!” Madame Croaker screamed. “My name is Sarah Croaker! Hogwarts class of 1991! I’m a Ravenclaw, a pureblood, and my favorite color is purple! I thought that I was asexual… But I’d never been with a man like you!”
His demand for her name had turned into a sudden share and tell. Harry smiled at her as she panted from the pounding she was taking.
“It’s nice to meet you, Sarah,” Harry said.
Hearing her first name from the man that was inside her up to his balls made Sarah Croaker cum on the spot. Harry kissed her straight after, giving her a taste of the treatment Hermione got. As her feet stuck up in the air, Sarah’s toes curled.
She and Harry kissed with extra tongue until Sarah had cum again. Harry promised to knock her up if she told him her name… and he would, but right now he was enjoying himself. He didn’t want to rush. Sarah didn’t complain, either. She had gotten as into it as he was.
As soon as Harry stopped kissing her he switched positions. Harry flipped Sarah over and moved her across the bed. When she adjusted to her new orientation, her head was right above Hermione’s thighs. Harry grabbed the back of Sarah’s head and shoved it down.
Hermione moaned. It was hard to tell if she was conscious or not. Either way, the head unspeakable was currently kissing her crotch.
“Taste it,” Harry ordered. “I want you to understand what you’re going to get.”
Sarah obediently put out her tongue and licked Hermione’s pussy. She licked off all the cum that was dripping out of the younger girl. When Sarah ran out of cum on the outside of Hermione’s snatch, she put her tongue inside and kept licking, driving her tongue deep into Hermione to find more seed. She must have gotten addicted to the taste.
Hermione groaned and stirred. Since she had been passed out when Sarah entered, she would have been completely lost as to who was eating her out. But after being in Harry’s orbit for these last few months, she didn’t even question a mysterious beautiful woman being between her legs.
Her first response was to grab Sarah’s head and push her down harder.
Harry laughed. The smoke was still active, so it could have been that Hermione was feeling the same unquenchable lust that Harry had been. Anyway, with Hermione doing the work of holding Sarah’s head down, Harry could use his hands for other things.
Harry spanked Sarah’s ass, watching the jiggling that followed the cracking sound of his slap. Harry hit her on both cheeks with both hands, rubbing her cheeks in between the blows.
Hermione bit her lip, getting extra turned on by the show. She stretched her stomach and wrapped her legs around Sarah’s head, using her thighs instead of her hands to hold the head unspeakable captive in her cunt. Harry grinned and held Sarah’s raw ass cheeks with both of his hands.
Together, they double teamed the head unspeakable in front of her watching subordinates. Sarah was moaning directly into Hermione’s cunt like a microphone.
Harry fucked her until his hips started to creak. He yelled out loud, his war cry filling the room, and gave her exactly what she was here for.
They had fucked for long enough that Harry’s balls had recovered, giving Sarah a creampie of equal proportion to the one that Hermione received. He held her big and soft ass cheeks that felt like pillows, gripping them and holding her hips back until all his cum had come out.
Sarah had successfully picked up all the cum Harry had left inside of Hermione, only to be given something new to suck on. Watching Harry creampie the woman made Hermione squirt into Sarah’s mouth. Sarah’s pussy was spilling cum from bottom, white seed leaking out around Harry’s dick.
“That’s the experiment done, right?” Harry asked.
Hermione looked confused. She had been passed out during Sarah’s explanation. Reluctantly, Sarah removed her mouth from Hermione’s pussy.
“Yes. All the data has been gathered,” she said.
Harry relaxed. The pink smoke was beginning to drain out of the room, making his mind feel like his own again.
Just as he let his guard down, Sarah twisted underneath him and got her legs around his waist. She trapped him, pulling him so that his dick rubbed on her pussy again.
“The experiment is over,” she said, “which means that I’m off the clock for the rest of the day. My job is very stressful. I’ve been looking for a recreational activity that would help me, as they say, let out that stress. If I could ONLY find a partner…”
Hours later, when Harry and Hermione finally left the room, Sarah Croaker remained on the bed. Her legs were spread and her hair was disheveled. There was cum all over her body, from her face to her breasts to her thighs. The sheets on the bed were ruined.
And Sarah had a huge smile on her face.
