Knicker Knight
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Growth Spurt Chapter 61
🕑 Added 2025-04-27 07:36:47 +0000 UTCI rewrote a bunch of this one last minute. I was originally going to include Angelina in the orgy, but she's one of my favorite Harry Potter girls so I want her first time in the story to be as more than just an accessory. I'll write a one-on-one chapter for them both sometime soon.
Harry crawled onto the bed with Tracey, his body looming over hers, only for Tracey to lay two hands on his chest and push him back.
“Not like this,” she said insistently.
She struggled up, although her legs weren’t as steady as they were supposed to be. Fortunately, she didn't have to go far. She took a few steps, then sat down heavily on the floor, spreading her legs for Harry.
“C’mon baby,” she said. “Now you can go wild.”
Harry descended on her. Tracey kissed him, and he leaned her back until she was on the floor and he was above her. His hands grabbed her waist, then slid down over her hips onto her thighs. He squeezed them until he had a good grip, pushing his tip against Tracey’s tight cunt.
“Spear me,” Tracey urged him.
Harry thrusted forward. His whole body pushed against Tracey’s, his muscles sliding over her soft womanly curves.
“Mmmmmph!” Tracy grunted. “AHHHHH! FUCK ME HARRY! FUCK ME WITH THAT BIG FAT COCK!”
She didn’t have to explain why she moved this to the floor. With both of them right on top of the wood, her voice could travel downstairs even more easily. Every wet slap as Harry’s dick stabbed into her cunt, every foul bit of dirty talk she uttered, and every moan she let out were going to go straight through the floor. Harry couldn’t spank her like this, but he pulled back and slapped her thigh just to create a similar noise.
His he clenched his glutes as he fucked Tracey hard. He almost kissed her, but completely committed to the plan, Tracey stopped him. Instead, Harry bit her neck.
“You’re so good baby!” Tracey screamed. “I—Nghah!—can’t handle it! You’re such a fucking stud! Breed me!”
Privately, Harry thought she might be going a little bit far. He wanted to recruit Aberforth, but he also wanted to live through the night. Still, Tracey hadn’t let him astray before. Even when they first met, and she duped him with a plot that involved some really lovely deepthroating, what she’d done got him Aberforth’s help like he wanted. No one ever accused Slytherin’s of being half assed or second guessing themselves when it came to their plots. In many ways, Tracey epitomized the perfect Slytherin even more than the purebloods who looked down on her. She was full of more ambition and cunning than anyone Harry had ever met.
Thinking about how much she had helped him and how competent she had proven to be only made Harry more attracted to her. Her sopping pussy was squelching around is dick, and he felt his balls growing tight. As he prepared to pull out, she wrapped her legs around him and squeezed.
“I TOOK THE POTION, JUST FOR TONIGHT!” she yelled.
Harry planned accordingly. He really hoped that was actually true, and not just another part of her dirty talk, because her legs weren’t loosening and he was fighting against them now.
His balls emptied in Tracy’s snatch. He bit her neck at the same time his sperm flooded into her, and this time there was no acting when Tracey screamed:
“GAAAAAAAAAAAAAAH!”
Tracey’s pussy convulsed, cumming for him. Her legs loosened now, unable to hold tight. As she caught her breath, taking a brief break from the noise making she’d been up to, Harry wondered how he could contribute more.
It came to him pretty quickly. Harry started to shift around, getting into a new position. Tracey noticed, and looked at him a little bit worriedly.
“Harry?” she asked. “What are you doing?”
“Making noise,” Harry said pleasantly. “We can’t let your voice do ALL the work, can we?”
Before, Tracey had had her legs around his waist, but now Harry lifted up his upper body, almost like he was squatting. Tracey’s dark legs were forced up into the air. Instead of his dick being aimed to thrust forward into Tracey, it was aimed straight down at her, his tip still buried inside her lips. Tracey’s eyes quickly took in the position and realized that she was in danger. Not that she was complaining.
Harry powered down into her with so much force that the floor underneath them shook. Then he pulled up and did the same thing again. The fleshy clapping between their bodies was at least twice as loud as it had been before, and it was now accompanied by muted thumps as Tracey’s body was pushed against the floor. Her legs slid up his body until her calves were trapped against her shoulder, which Harry used to fold her in half even more effectively.
“Oh Merlin! So big and… Ahhhhhh! Ah! Ah!” Tracey’s moaning only got worse and worse. “AHHHHHHHHH!”
They’d gotten quite an early start if their goal was to keep Aberforth up all night. Harry didn’t believe that was an oversight on Tracey’s part. She knew perfectly well what freakish stamina he had.
“Birth Control potions are completely effective, right?” Harry asked. “From what I know, they last for 24 hours and it doesn’t matter how much cum they have to deal with, nothing will happen. Is that it?”
Tracey nodded, still moaning. She knew what her fate was. And she couldn’t wait.
An hour later, Harry’s thighs were burning. It was a testament to his raw strength that he managed to stay in this position for so absurdly long. Underneath him, Tracey had finally stopped making noises. She’d screamed her vocal chords raw, and would probably be without her voice for the next day at minimum. At first, Harry made up for it by thrusting harder to use the sound of their colliding bodies, but that didn’t really have the same effect. The door opened.
Harry looked up as Tonks walked in. Through the doorway, he could see Angelina sitting against the wall with a silly expression on her face. Her pants had been pulled down, and her dark thighs were glistening along the inside with arousal. Arousal that was also on Tonks’s face and fingers.
Tonks pulled Angelina into the room behind her, setting the dark skinned girl up to watch. She turned to Harry.
“Tracey looks pretty out of it,” she commented.
Harry pulled his dick out of his strategist. It trailed cum as it rose into sight. Even Angelina, who was pretty thoroughly fucked after whatever Tonks had done to her outside, couldn’t help but stare at it hungrily.
“The plan was for Tracey to make as much noise as possible for as long as she could, but that doesn't really seem to be viable anymore,” he said sadly.
Tonks undid her robes and let them fall to the floor. She pulled off her bra and knickers right after. Once she was completely naked, her body started to change. She got shorter, her tits got smaller, and her hips got curvier. Tonks’ skin went from pale to the kind of dusky brown you’d expect on someone who was mixed race. Her pink hair became curly. The transformation was widespread and performed with perfect accuracy.
“How is this?” she asked in Tracey’s voice.
“Perfect enough to fuck you for half the night,” Harry said.
Tonks beamed. She bounced over, enjoying herself the way Tracey’s perky breasts and thick ass bounced. When she got to Harry, she sank down and licked the cum off of it. “I didn’t take the potion today,” she explained. “Didn’t think that I would need it. That was silly, looking back.”
Once he was clean, Tonks dropped down on her knees and raised her rump, wiggling it back and forth.
“Come here and fuck this fat ass of hers, Harry,” Tonks urged.
She reached back, spreading her own cheeks. Tracey really did have an excellent butt. It was as good as almost any that Harry had encountered. Ironically, one of the few girls who had her beat was also in the room, fingering her dark cunt as she watched Harry descend on the fake Tracey. He and Angelina would surely get busy soon, but that could wait for another night.
Right now, he had a plot to keep up. Tonks was literally holding her hole open for him… and he didn’t mean her pussy. The dark, tight little asshole stared at him like an eye. Harry spat, rubbing the saliva in with his thumb, and used his magic to make the wet spot grow. Using this magically created spit, he pushed his tip against the hole’s entrance, testing it out. It was going to be a tight fit.
“Do it!” Tonks urged.
Harry thrusted in, and Tonks’ asshole just about tripled in size.
She screamed of course, but even now her transformation was perfect, and her voice was indistinguishable from Tracey’s. Harry beamed. The plan was still on! He glanced at the real Tracey, who was watching with a satisfied expression, and wondered if she even predicted this part: that he would bring Tonks and the metamorphmagus could be used as a stand in. Probably not… but maybe. If there was anyone who had shown enough cunning to guess this would happen, Harry believed it was Tracey.
As far as her plots went, he had to admit, this one was probably the most fun he’d had with one.
Tonks growled and screamed as he fucked her tigh hole. He grabbed her ass, placing his hands over her as he did, keeping her cheeks spread. Instead of plunging into her on his knees, he was squatting again, which allowed him to maintain a higher top speed. The pleasure was so intense that Tonks began thumping her forehead into the floor as she dealt with how hard her body was being stimulated.
Harry fucked her relentlessly. The problem of her not being on the potion today had been solved naturally just by using another hole. Soon, he was filling Tonks’ ass one orgasm at a time.
Angelina’s moaning caught his attention. He looked over and held eye contact with her as she touched herself and he plowed Tonks from behind. Angelina quickly grew embarrassed, looking away, although she also moaned louder.
Harry put his attention back toward Tonks. He’d let go of her hands, squeezing her hips, and she placed both arms in front of her face to cushion it against the floor. She made sure not to cover her mouth, though, which was moaning extremely loudly. Harry kept going as long as Tonks could hold out, which turned out to be an impressive hour and a half. By the time he pulled out of her ass, she was positively dripping with his cum. Hands wrapped around Harry, stroking his sore but still stiff cock.
“I’ve got my voice back,” whispered the real Tracey. “Should we pick up where we left off?”
She rubbed her hand along his dick a couple of times to get him excited, then dropped down next to Tonks in exactly the same position. Until the very early morning, Harry switched between them for as long as he had stamina, filling their asses slowly but surely while Angelina fingered herself until she was sore. He doubted anyone staying at the hotel got a good night’s sleep. But, if Harry had to guess, he’d say they got some pretty good inspiration for their own fantasies.
Except for Aberforth. Aberforth, in general, just had a VERY long night.
O-O-O
The next morning, Tonks and Tracey were both walking bowlegged, while Angelina was clearly groggy with a lack of sleep. When they got downstairs, it was completely barren except for Aberforth. The old man was drinking from a mug with empty glasses beside him. He didn’t look up when they entered.
“Thanks for letting us stay!” Harry said happily. “I feel really well rested now. You really saved us there.”
Aberforth didn’t answer, finishing what was in his cup in silence. He had circles under his eyes.
“Bad night of sleep?” Harry asked.
“You are so lucky that I know it was her idea,” Aberforth grumbled. “You aren’t smart enough to think of something that devious.”
Tracey giggled innocently.
“It’s too bad you didn’t agree to come with us,” Harry said. “But that’s fine. I’ll come back another time to convince you. As many times as I have to.”
Aberforth grimaced. “Don’t bother.”
He stood up, lifting what Harry realized was shrunken luggage. The man was ready to move somewhere completely different. Despite the fairly cheap plot used to badger the man, Harry couldn’t deny feeling earnestly excited.
“Then you mean you’ll really come to the ministry?” Harry asked.
“I’m not joining them. I’m joining you,” Aberforth said while glaring.
That expression slowly faded in favor of a smile that scared Harry much more.
“Look forward to your training,” Aberforth said.
He walked out of the room ahead of them, laughing his ass off. Harry felt a chill even though he’d been in a good mood. He turned to Tracey.
“Am I going to be alright?” he asked.
“Good news!” she said. “I don’t think you’ll die. And other than that… you’ll get stronger fast, right?”
Harry was sure that he would. But by Merlin, this was going to hurt.
