All across wizarding Britain, the familiar green flames of the floo network were roaring to life as witches and wizards traveled about. But in some homes, those flames took on a rather different hue, conjured with an altered allotrope of the powder recently produced by underground potioneers and easily obtainable if you knew the right people. When the flames turned magenta instead of green, the fireplace became connected randomly to any other magenta fireplace active at that time. Initially dismissed as useless since the inability to travel to an exact destination seemingly made this variant of the powder useless for ordinary for floo travel, enterprising magicians soon realized that making a random, anonymous connection through a portal in the privacy of their homes afforded certain opportunities. And so within just a few months of its arrival on the black market, the powder's real use became an open secret as masses of wizards and witches began having encounters with each other via this parallel floo network.
In Grimmauld place, the fireplace turned magenta every night. And every night, its lone occupant found himself standing in front of the flames, partly repulsed by this nightly habit he had developed, but overwhelmingly compelled to explore the new possibilities every night offered. And as he once again stood at the hearth, teetering on the edge between indulgence and repentance, Harry Potter stepped forward and thrust his penis into the fireplace.
Immediately he felt the familiar pull and swirl of the network as the warp and weft of spacetime were distorted, connecting his fire with another. As he waited for the link to form, Harry felt glad for this new form of connection. It was so much easier when the other person didn't know who he was. No awkward questions about his failed marriage; no surreptitious glances at his scar; no pressure to fulfill some poor girl's fantasy of who he should be. Now, it was only sensations. No pitfalls. No complications. No baggage. Just sex.
Finally the tug in the fire weakened, and he felt the chill air of another room on the other side of the portal. Quickly, a hand was around his cock, gently caressing the shaft with delicate, lithe fingers. He felt her - almost definitely a her - lightly drag her nails along the underside of his scrotum, tenderly fondling him and carefully stimulating the strip of skin on his perineum. This elicited a low moan of pleasure and anticipation from him, and he tried to show the person on the other end of the connection his pleasure by flexing his muscle and raising his cock.
He was swiftly rewarded with the feeling of a firm, wet tongue running up the underside of his shaft along his favorite vein. When she reached the tip, she lingered, pressing her tongue ever so slightly harder against the tip before enveloping it with her moist, soft lips. Harry immediately felt the rightness of her kiss, this welcoming environment a tantalizingly close simulation of entering a prepared pussy. He felt the wet seal of pressure where her lips met move down the length of his shaft, and she got about halfway before abruptly slowing to a halt, not able to go much further. 'Ah', he thought, 'inexperience. She can't deepthroat yet.' He withdrew slightly to show her this was ok, that he wasn't expecting anything more, but the girl stayed locked on him, beginning to exert some suction pressure and refusing to back down from the task. Her hand returned, firmly gripping the base of his shaft to hold him in place while she struggled little by little to get her lips further down the shaft. Every few movements she would fight down a gag, and those sudden flares of muscle movement in the tight throat tunnel that now encircled his tip excited him.
He knew that this would never be possible with a girl in his bed: he'd never be able to watch her struggle like this, tears perhaps welling in her eyes, and would insist on abandoning the effort by enthusiastically substituting something else in place of fellatio to prevent the girl from feeling she had failed. But in this anonymous moment, the thought of this girl struggling for him - maybe even pushing herself past her limits - only made his cock harder. He reached a hand through the fire, feeling around until he found the girl's head bobbing up and down on him, gently gathering up her long, straight hair behind her head into a fistful that he could use to control her pace. He slowed her down, eager to show her that a long and deliberate stroke was better than a quick and shallow one at this point in the process. Harry knew that in order to cum he would need that fast and enthusiastic polishing of his knob, but it was hardly time for that yet as they'd only just begun.
As he started to become rougher with her, using his control of her head to force her down and press deeper into her throat, he felt her give in and allow him complete control as he fucked her mouth. This further excited him, knowing that she had surrendered, and soon he had both hands gripping her hair, thrusting at full throttle as he mercilessly extended himself into her. He felt her sloppy slobber accumulating at his base as she struggled to cope with his aggression, and the thrill of being able to do as he pleased brought a unique sense of power that seemed to emanate out of his cock and into the deepest reaches of his mind. This realization and the continued sensation of her warm, wet, smooth throat tightly gripping him as he slid in and out brought him right up to the edge of climax, and after briefly considering pulling out to extend this engagement, he decided instead to seize the moment and use her for all she was worth. With a final great thrust, his cock heaved and began to twitch as he came, unloading a massive, thick load of his spunk straight down her throat. Maintaining his tight control of her head, he stayed lodged in her throat as he finished, pumping away while ejaculating as she did her best to gulp down his load, until finally he was sure that he had completely emptied himself into her.
At last he released the girl, and he felt her quickly withdraw, gasping for air, slurping up the loose saliva and semen that had spilled out, and releasing his spent cock. She gently pushed him back, and as he stepped back from the fire, he was sure she would be closing the connection that bridged their worlds. Much to his surprise, however, he saw the flames brightening, indicating that some part of her would now be entering his home.
Faintly in the fire he could make out an incoming shape, and in a few seconds it became evident that the girl was now bent over and sticking her backside into the flames. A pair of pale, round cheeks emerged from the fire, supported by meager thighs and topped by a foot or so of waifish midsection. From knees to ribs, her midsection protruded into his living room, and he knew immediately that she was asking him to return the favor. With great relish, he took hold of her hips and buried his face between her cheeks, his nose pressed up against her pungent hole and his tongue beginning to probe her slit below. Her labia were tiny, hardly protruding from her body at all, and as he began to lap at her she quivered slightly. Her clit was large and stiff, an unexpected contrast to the rest of her vulva, and he expertly darted his tongue in and out, over the sensitive tip, taking care to drag out his licks in a firm and gentle pattern up and down the underside of her protruding clit.
All the while he maintained a tight grip on her hips, the girl's slight frame making it exceptionally easy to keep her steady even as she twitched with pleasure. They continued like this for a long while, Harry resolved to try different approaches until he could make her cum, always sure to maintain each different activity steadily for several minutes in case it was the one that would trip her trigger. At long last, she began to push back and grind into his face, and he felt her muscles tense and her back slowly arching. She was approaching climax. He varied nothing, continuing the rapid flicking of his tongue up and down the length of her slit that brought her here. Suddenly she froze, stock-still, and after a heartbeat of two she came, shaking and quivering as thick, clear secretions flowed from her cunt into his mouth. Harry gladly lapped them up and smeared the mess all over her with his tongue, savoring the bitter, umami weight of her flavor. Her orgasm lasted for a good while, and from the grip on her hips he could feel her stomach muscles curling and clenching as she rode the wave of pleasure. This was the part he loved best, finding out how each girl came, witnessing some anonymous witch's deepest and most private pleasure. He often wondered if he knew her, or had passed her in the street earlier that day with no inkling that he'd be a party to her paroxysm later that night.
When the girl was finished, he released her slowly, expecting to see his partner withdraw back into her fireplace now that she had been satisfied. But as he waited, the girl's ass remained firmly in view, sticking out of his fire. Perhaps, he thought, she is just gathering her thoughts, not eager to rush out of the afterglow from what had seemed to be a pretty cathartic orgasm. As the moments passed, though, she did not retreat. And, in fact, she began to wiggle herself suggestively. At last, a hand appeared through the portal and she reached behind herself to point at her pussy and then spread it open. Aha! He got the message.
Harry's cock had remained stiff from excitement throughout their encounter, and although he was a bit sore from his earlier climax, he wasn't about to disappoint a lady and pass up a chance to plug his rod into her socket. Harry stepped forward, noted that there would be no difficulty sliding in on account of how messy she was, and stuck it in.
Immediately he felt at home, her post-orgasmic pussy creamy and slick beyond his wildest dreams, and he effortlessly glided into her as she easily accommodated his length. Placing one hand on the small of her back to steady himself and reaching his other hand through the fire to again find her hair, Harry soon had her long hair in his grip like reins and began to clap into her from behind at a slow and steady pace, taking care to note the exact feeling of his every inch sliding into this loose, messy, eager, willing pussy. While so many of these nightly liaisons blurred together, he was sure this feeling would be seared into his mind forever. He had never felt such a natural connection inside any other pussy as he did now, as she seemed to shape perfectly for him, easily taking his full cock without limit while maintaining enough resistance to create the friction he needed for simulation. Yes, he thought, this was his pussy, and it was only right for him to be taking full advantage of her tonight.
Harry continued to ride her, picking up the pace, pulling at her hair. He drew his hand up from where it had rested and slapped down on the outer half of her ass, creating a crisp, pleasing smack. The girl winced and bent a little more, but pressed back against him to show this was a welcome addition. Taking the hint, Harry repeated the smack, then again, and soon he was relentlessly flogging her, still pulling her hair back, still putting the very tip of his cock all the way to the back of her pussy, still feeling the slight vacuum pressure inside her on the backstroke as his tip reached the tight seal of her labia, still admiring the thick cream that had accumulated at their nexus, still feeling how raw and fertile and—
That was it! He was cumming! He felt himself explode in her, somehow conjuring another massive load from deep in his loins, his body tapping every resource to ensure he gave her the creampie filling she deserved, and with one… two… three… four spurts he had done it. He practically collapsed onto her as he finished, wrapping his arms around under her stomach and holding her torso to his. As Harry lurched forward, he narrowly avoided his head going into the flames, almost breaking the one cardinal rule of these magenta trysts: that nobody was to be seen or known, that whatever transpired was anonymous and fleeting, the parties never knowing more than strictly necessary to arrive at their mutual satisfaction. The two of them stumbled together, regaining their balance, and they swayed in the flames, finding equilibrium.
Harry held her a long while, his cock never leaving, until he felt her begin to stir and wriggle free. As the girl stood and their bodies parted, a loud and messy queef escaped her as the cum and air burbled out of her thoroughly used pussy. Harry thrilled at this rare treat, enjoying the spectacle the girl made as she pushed out a bit more of his load. And with that, she was gone, vanishing back into the flames.
Hermione righted herself and stepped out of the fire, careful not to dislodge too much of the stranger's sperm nor wipe away their combined mess. She gingerly stepped across the study, towards the large chair where Ron waited, the jealousy and frustration and above all else pride in seeing his wife used like this by other men driving him wild inside, inspiring greater passion and arousal than anything else they'd found in their marriage. The magenta floo was truly a blessing, he thought, as the social stigma and shame of sharing his wife so widely would have completely prevented him from ever indulging this desire outside of this anonymous network. But here, he could watch her behave like a filthy slut all night before reclaiming her. Now he watched, transfixed, as Hermione approached him, their eyes never breaking contact despite how desperately he wanted to glance down at her used pussy in anticipation of what it would smell like, taste like, look like.
"Well, honey," she spoke, and he was enthralled, "are you ready for your sloppy seconds?"