Chapter Text
Hermione resituated herself in the observation booth following her lunch break, organizing her clipboard and preparing herself mentally before the next round began.
The Department was testing a newly developed fertility potion, which prompted a witch's body to immediately release four to seven ova in order to increase the chances of fertilization and implantation.
The question the Unspeakables were currently asking was whether it was possible for a witch taking this potion to become pregnant by more than one wizard at simultaneously. In order to test this, the Department had gathered volunteers. Each participating witch would, while taking the new potion, have intercourse with a group of five wizards. In order to ensure each man's sperm had equal opportunity to impregnate her, they would do so on a rotation in quick succession. In cruder terms, the each witch was to be gangbanged repeatedly until she was pregnant.
To maintain experimental integrity, an Unspeakable was required to watch each group, making notes on their activities and compliance with the procedure. This would be the fourth group Hermione observed today.
To further maintain integrity, all of the participants were required to live in the Department until the witch in their group was confirmed to be pregnant. This ensured their activities could be monitored around the clock, and no one would be able to muddle the procedure with extracurricular intercourse.
Hermione looked at her clipboard, and read the parchments there for the first time.
Experimental Group F: Ginevra M. Potter, Harry J. Potter, Blaise H. Zabini, Earnest B. Macmillan, Anthony R. Goldstein
Hermione's mouth grew suddenly dry. Harry and Ginny knew she was an Unspeakable. Following the war, the Department as a whole had been required to abandon the masked hoods and code names for the public's safety and peace of mind. They hadn't told her, however, that they'd volunteered for the study. She'd just come from lunch with them, having met them to say goodbye before they left on a trip of unknown length. A trip that was apparently into the Department of Mysteries.
She swallowed. She could be a professional about this. They were good candidates, honestly. Ginny's family history with fertility was promising. Speaking of fertility, Hermione quickly reviewed each group member's results on the fertility tests they'd undergone, and signed the line on the form indicating she approved.
She then activated a rune, sending a notification to the waiting area. All six participants listen on her sheet entered the chamber wearing only house robes. They couldn't see her, though they knew they were being watched. Hermione wondered if her friends had asked for the name of the Unspeakable assigned to their group. Ginny carried a pink box, while each of the men carried blue ones. (Hermione had scoffed at the gender-normative color coding, but hadn't thrown a genuine snit. It was easy to remember, at least.) Each box contained doses of potions. In addition to the fertility potion Ginny would take, each of the wizards had a virility potion that would help them to recover more quickly post-orgasm. Every box also included a lust potion, which the participants could choose to take or not, in the event that someone needed help getting aroused. Hermione made notes on the parchment about which of them took it, unable to ignore the fact that neither Harry or Ginny felt the need. Apparently, they felt they were aroused enough.
Ginny laid down on the bed in the center of the Chamber after shedding her robe. Harry approached her first, his large cock jutting out ahead of him as they grinned saliciously at each other. Hermione shifted in her seat, slightly horrified to realize she was getting aroused herself. She didn't need to make any more notes for awhile unless something went wrong, so she didn't even have that to distract herself.
She hadn't been turned on at any point this morning! Harry was rubbing his cock against the folds of Ginny's sex, his mouth on her neck as she squirmed beneath him.
Hermione pressed her legs together and groaned softly. In truth, she had fantasized about Harry semi-regularly since she was young. Sometimes he was with her in her fantasies, and sometimes he fucked someone else while she watched just like this. The fact that Harry was hung wouldn't bes a deterrent at all.
She'd thought about Ginny, too. It started when Hermione first overheard her and Harry fucking without a silencing charm, but from there the redhead had become a large part of Hermione's realization that she was bisexual.
So Hermione didn't really stand a chance of maintaining an air of professionalism, watching her two most attractive friends act out one of her most secret fantasies. Harry was inside Ginny, now, fucking her in long, powerful strokes while working her clit with his thumb. She was flushed, color traveling down her neck and chest, over her peaked tits. She moaned constantly as Harry seemed to be speaking into her ear. The chamber was silenced, but Hermione was transfixed by the column of Ginny's throat as she tossed her head in ecstasy.
Ginny seemed to scream, and Harry's hips stilled almost entirely, pushed deeply inside his wife. Hermione wondered if the head of his cock reached Ginny's cervix, and thought that it probably did based on its size.
A rune on her desk lighting up startled Hermione from her lustful musings, and Hermione scolded herself. The lit rune indicated that someone - in this case, Harry - had ejaculated. She had been the one to tune it to respond only to the male orgasm.
Harry pulled his cock - softening because he hadn't taken the lust potion - out of Ginny and pressed an open-mouthed kiss to her abdomen before backing away. The other men in the chamber had circled around the couple while they fucked, and Macmillan took Harry's place between Ginny's legs.
Macmillan didn't seem to be quite as impressive sexually as Harry. Ginny was enjoying herself, but she wasn't lost in pleasure the way she had been while her husband fucked her. Perhaps the comparison was unfair - Harry had certainly had more time to learn Ginny's preferences. Ginny dropped her own hand to her clit. Macmillan had taken the lust potion, and was very consumed in chasing his own orgasm.
Harry approached Ginny from the direction of her head, and Hermione wondered if she was going to have to reprimand him for breaking procedure. He wasn't fully hard again yet, but he did seem to enjoy watching his wife get fucked with another man's cock. Harry didn't try to get Ginny to touch him, like Hermione had worried he would. Instead, he began plucking and twisting her nipples. Ginny's face screwed up in pain-pleasure, and Harry gave off her a cocky grin.
Macmillan came inside Ginny with a shout, and Goldstein took his place. Goldstein, too, had taken the lust potion. He tried to be more conscious of Ginny's pleasure, Hermione could see, but the potions the Department had provided were strong. It could invalidate an entire group's participation if someone couldn't reach orgasm. Harry didn't move away this time, continuing to touch Ginny while Goldstein fucked her fast and hard. Harry's cock was fully hard, hanging heavy and flushed between his legs, but he still made no move to gain relief. Maybe he'd learned to follow rules at some point.
Neville replaced Goldstein. To Hermione's surprise, Neville and Harry traded shark-like grins before Harry abandoned his wife to their fellow Gryffindor. Ginny didn't protest the loss, and it was quickly obvious why when Neville easily drove her to the same highs that Harry had, leaving her writhing beneath him. Harry had moved to stand beside Zabini, and based on their body language Hermione thought her friend might be coaching the Slytherin. No doubt on the finer points of Ginny's body, since Blaise Zabini had a well-substantiated reputation for having a new lover each week and certainly knew how to please a woman.
Hermione's hand slipped between her legs, pressing against the heat of her sex. When she realized what she was doing, she pulled her hand back as though burned. She couldn't.
Neville came, and when he pulled away Ginny looked thoroughly fucked. Cum leaked from her well-used cunt, and Blaise scooped it up and pressed it back inside her as he got into position for her first turn. Rather than pleasuring Ginny separately, as Harry had for the two men who had chosen to drug themselves, he stood beside Blaise and continued to coach. Hermione watched him nod and gesture as Zabini followed the path he was laying out to each of Ginny's sweet spots. Despite how sated the witch looked, Zabini brought her to another intense-looking orgasm quickly before coming himself. He hadn't lasted long, but he had just watched from the sidelines as four different men fucked Ginny, so Hermione thought it was understandable.
It was Harry's turn again, and Hermione watched him ask Ginny a question. Apparently too breathless to speak, she responded with a thumbs-up. Harry slid his cock into his wife's pussy again, and Hermione moaned slightly at the sight. Ginny had taken five loads of cum so far, and the mingled results gave a pearly sheen to Harry's (thick, lovely, huge) cock as he took his second turn. Hermione's hand dropped to her lap again, and this time she didn't pull away. She ground against it, staring as Harry's cock disappeared over and over again inside his wife.
Hermione continued to observe as each of the men took their turns, trying to remember to watch carefully for any possible infractions, but hopelessly distracted by her own mounting lust. By the time Neville approached Ginny again, Hermione had abandoned restraint and hand her hand inside her knickers, two fingers buried in her cunt while her thumb furiously rubbed at her clit. Her other hand found its way inside her shirt as the men took their third round fucking Ginny's cunt. Hermione was never more grateful for the spells which took the place of bras as she was now, with easy access to her pebbled nipples a top priority as she chased orgasms of her own.
Before Hermione knew it, each of the men had gone four rounds and the session was over. She quickly straightened her clothing and spelled away any trace of sweat or her own sexual fluids. The bed where Ginny laid had changed shape slightly to elevate her hips, and she laid there while each of the men slipped into their robes.
Hermione stepped into the chamber with them, holding her clipboard and hoping it made her look more professional. She couldn't spell away the bright flush to her skin, but hoped it would be mistaken for an embarrassed blush.
Neither Harry or Ginny reacted to Hermione's appearance, but after the level of sexual openness and confidence she'd just seen them display she couldn't take that to mean they'd known she was the one watching.
"Thank you for your participation, everyone," she addressed the group, keeping her voice as steady and strong as possible. "In a few moments, one of my colleagues will escort each of you to the rooms you'll be staying in. I remind you that intercourse outside of scheduled sessions is forbidden at this time. You'll all be allowed to leave again once an Unspeakable has confirmed that Mrs. Potter has- successfully become pregnant." Hermione was proud of herself for only stumbling slightly over her words, given how flustered she was internally. She might tell her boss she wasn't feeling well and take the rest of the day off.