Adult-FanFiction.org : Harry Potter

Sizeable Secrets	By : llmfiction Category: Harry Potter > Threesomes/Moresomes Views: 11501 -:- Recommendations : 0 -:- Currently Reading : 0
Disclaimer: I do not own Harry Potter

Chapter List
- 1-The Potion
- 2-Aftermath: Hermione's Breasts
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Note: Please please please leave a review! This is my first story!
After one grueling Quidditch practice, Harry trudged into the Gryffindor common room, his broom slung over one shoulder. He dropped onto the sofa with a weary sigh, his Quidditch robes damp with sweat. Hermione, already immersed in her books at a nearby table, peered at him over the rim of her glasses.
"Rough practice?" she inquired, as Harry nodded, rubbing his sore muscles.
"Yeah, and it's not the only problem I have," Harry grumbled, setting his broom aside. Hermione's brow furrowed with concern.
"What's going on?" She closed her book, her full attention now on Harry.
Harry exhaled deeply. "It's for our Defense Against the Dark Arts assignment. We need to invent a new spell or find a new use for an existing one. I'm stuck."
Hermione's eyes lit up. "Tell me about it. What's your idea?"
"It's... complicated," Harry hesitated, but at Hermione's insistent look, he continued. "I've been trying to develop a spell that could make a Quidditch ball invisible during a game. Imagine the tactical advantage!"
Hermione chuckled. "That's ambitious. But invisibility spells are tricky. They usually require an object to cover the target, like an invisibility cloak."
Harry pulled out his notes from his Quidditch bag. "Exactly, but I'm thinking of a spell that creates an expanding magical field around the ball. It would make the ball invisible without physical cover."
Intrigued, Hermione took his notes, her eyes scanning the intricate details. "This could revolutionize Quidditch — assuming of course there are no issues with anyone noticing they’re missing an invisible ball… But to humor you, what's the issue?"
Harry pointed to a line in his notes. "The spell's power is unstable. It can only sustain invisibility for a few minutes."
Hermione's expression turned thoughtful. "That's still impressive, Harry. But I see why you want to extend the duration."
Harry nodded, frustration evident in his tone. "I need it to last for at least an entire game."
At that moment, Hermione's own project came to mind. "I'm working on something that might help. A potion for enhanced reflexes and agility, specifically for Quidditch players. I need to test it, though."
Harry, seeing an opportunity for mutual aid, agreed. "Okay, let's help each other out."
They moved to Harry's dormitory, where Hermione had set up a makeshift laboratory. Bottles of potions and spellbooks were scattered around. Harry examined a vial of shimmering liquid Hermione handed him.
"Just a sip," she instructed, preparing to take notes.
Harry downed a small amount of the potion. Almost instantly, he felt a surge of energy, his senses heightened. He described the sensations to Hermione, who jotted them down excitedly.
"Try catching the Snitch now," Hermione suggested, handing him a practice Snitch.
Harry released the Snitch, and to their amazement, his reaction time was significantly faster. He caught it effortlessly, a wide grin spreading across his face.
"Your potion works!" he exclaimed.
Encouraged by this success, they turned their attention back to Harry's invisibility spell, brainstorming ideas late into the night. With their combined knowledge and skills, they were determined to overcome the challenges and make groundbreaking contributions to the wizarding world.
"I can't focus," Harry groaned, clutching his head.
Hermione, who had been observing the effects of the agility potion, looked on in alarm. She had never seen such a reaction before. "Harry, what's wrong?" she asked, her voice laced with concern.
Harry's grip on his head tightened. "It's like my head is spinning. I can't concentrate at all." He stumbled slightly, trying to maintain his balance.
Hermione realized the potion might be affecting his cognitive functions. She reached for her bag, hoping to find something that could help. "Stay still, Harry. I'll find something to counteract it."
Before she could rummage through her bag, Harry's hand shot out, grasping her arm. "No, wait," he insisted, his voice strained. "It's starting to pass. I think I can focus again." He slowly released her and took deep breaths, trying to steady himself.
After a moment, Harry's expression softened, and his posture relaxed. "Okay, I think the worst of it is over," he said, his voice steadier now. "But that potion definitely needs some tweaking."
Hermione nodded, her concern not fully abated. "I'll have to revise the formula. We don't want unexpected side effects, especially in a Quidditch match."
Just as Harry started to speak, a sharp pain seemed to hit him. He winced, clutching his side. "Something's wrong," he gasped.
Hermione watched, a mix of fear and helplessness in her eyes, as Harry struggled with the sudden discomfort. He started tugging at his Quidditch gear, which seemed to be constricting him. "It's too tight," he gasped, discarding the gear in an attempt to alleviate the pressure.
Hermione, realizing the severity of the situation, decided they needed help. "I'm going to get Madam Pomfrey," she declared, ready to dash out of the room. Harry's situation was beyond their ability to manage, and professional medical attention was urgently needed.
But then — Hermione saw him start to pull away his clothes, revealing the issue: a growing bulge in his pants. Massive, unlike anything she’d seen from the boys in her grade (not that she’d been looking!)
Hermione watched in disbelief as Harry continued to tug at his clothes, further revealing the massive bulge in his pants. She had never seen anything like it before, and she couldn't help but feel a mix of curiosity and arousal. But she knew that this was not the time for such thoughts.
"Harry, what's happening?" Hermione asked, trying to keep her voice steady. "Is there something wrong with your Quidditch gear?"
Harry shook his head, wincing in pain. "It's not the gear," he managed to say. "I don't know what's going on."
Hermione's eyes widened as she realized that Harry was experiencing some sort of magical transformation. She knew that such transformations could be dangerous, and she needed to act fast.
"Harry, we need to get you to Madam Pomfrey," Hermione said urgently. "This is beyond our ability to manage."
But before they could leave the room, Harry's transformation continued. His clothes ripped apart as his body grew larger and more muscular. And then, to Hermione's shock, a massive cock emerged from his pants, throbbing with power.
Hermione couldn't help but stare at it in amazement. She had never seen anything like it before, and she felt her own body responding to the sight of Harry's massive member. But she knew that this was not the time for such thoughts.
"Harry, we need to get you to Madam Pomfrey," Hermione said again, trying to keep her voice steady. "This is a magical transformation, and it could be dangerous."
But Harry shook his head, his eyes fixed on Hermione's body. "No," he said hoarsely. "I need you, Hermione. I need your help."
Hermione felt a surge of desire as she realized that Harry was asking her to help him with his transformation. She knew that this was not the time for such thoughts, but she couldn't resist the temptation.
"Okay," she said, her voice husky with arousal. "What do you need me to do?"
Harry reached out and grabbed Hermione's hand, pulling her towards him. She felt his massive cock pressing against her thigh as he pulled her closer. And then, before she could react, Harry pushed her down onto the bed and positioned himself above her, ripping off her clothes to reveal her small, budding breasts. Then he pulled down her under garments.
Hermione gasped as she felt Harry's massive member pressing against her pussy. It was too big for her, but she couldn't resist the temptation to try it anyway. She spread her legs wider and lifted her hips, trying to take him inside of her.
But it was no use. Hermione could feel herself stretching as Harry pushed deeper into her, but his massive cock was simply too big for her tight pussy. She gasped in pain as she felt herself tearing apart.
As Harry pushed deeper into Hermione, she was stretched beyond her limits. She gasped in pain as she felt herself tearing apart, but Harry was too far gone to stop. He continued thrusting into her with wild abandon, his massive cock pounding against her tight walls.
Hermione tried to hold on, but the pain was too much for her to bear. She cried out and pushed Harry away from her, trying to catch her breath. But before she could say anything, Harry's face contorted in pleasure as he came inside of her.
Hermione lay there in pain, her body still reeling from Harry's massive cock tearing through her tight pussy. She could feel the cum inside of her mixing with her blood. Luckily she was on an anti-contraception potion, but the blood gushing down her leg was nauseating.
Harry, on the other hand, looked embarrassed as he apologized for coming so quickly. "I'm sorry, Hermione," he said hoarsely. "I didn't mean to hurt you."
But before Hermione could respond, she felt something strange happening to her body. Her breasts began to grow, slowly at first but then more rapidly until they were a full B cup. She looked down in disbelief as her small training bra struggled to contain them. A strap broke and her full breasts were exposed to Harry.
Harry's eyes widened as he saw what was happening to Hermione. "What the hell is going on?" he asked, his voice filled with concern.
Hermione shook her head, still in pain from Harry's massive cock tearing through her tight pussy. "I don't know," she said hoarsely. "But it has something to do with your cum."
As Harry watched in amazement, Hermione's breasts continued to swell until they were a full C cup. He couldn't help but feel aroused by the sight of her new, voluptuous curves, but he was also concerned about what this transformation meant for her health.
Harry looked down at his own body, which was still covered in sweat and cum. He knew that he had come too quickly, but he hadn't expected this kind of reaction from Hermione.
"I'm sorry," he said again, feeling guilty for what he had done to her. "I didn't mean to hurt you like this."
Hermione quickly covered her naked body with a blanket, feeling both embarrassed and angry at Harry for pushing his luck too far. "I can't believe you did this to me," she said, her voice shaking with emotion.
Harry looked down at the ground, ashamed of what he had done. "I'm sorry, Hermione," he said hoarsely. "I didn't mean to hurt you like this."
Hermione shook her head in disbelief. "You don't get it, do you?" she asked, her voice rising with anger. "This isn't just about me being hurt. This is about you not respecting my boundaries and pushing yourself on me without my consent!"
Harry looked up at Hermione, his eyes filled with remorse. "I know," he said quietly. "And I'm truly sorry for what I did."
Hermione sighed, feeling her anger start to subside. She knew that Harry was a good person who had made a mistake, and she didn't want to hold it against him forever. But she also knew that this incident would change their relationship forever.
"I need some time to think about this," she said finally. "And I need you to respect my decision."

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Please leave reviews! This is my first story ever and I'd love your input on where to go with it next!
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Sizeable Secrets