Sibling Class Demonstration

Ten years ago, give or take a couple days, I published my first story on Lit, Dirty Naked Poker. I don't know exactly what I expected, but it definitely wasn't a decade of this. All I can say is that I'm overwhelmed, humbled, and truly honored by the responses my stories have received here. I hope I can continue to live up to those expectations for another decade or two.

Say it with me friends, one more time with feeling: everyone depicted here is over the age of 18. Now let's fucking gooooooooooooooooo!

"Rachel, do you love your brother?"

The young brunette looked up from her desk, dazed. She'd been so absorbed in her schoolwork, she hadn't noticed the other teacher coming into the classroom, let alone recognized that she, herself, was the one being directly addressed.

Mrs. Genesee, standing in the doorway in a dark blue dress, repeated her question. "Do you love your brother, Rachel? Truly?"

It was such an odd question. Random. Rachel's brother was a mere 11 months older than her and the closeness in age was both a blessing and a curse. She supposed they got along as well as other siblings did. As a brother, did Rachel love Aaron? Well, yes, of course. It seemed non-optional, honestly.

But Rachel sensed that Mrs. Genesee meant something more than that. And so, Rachel took her response quite seriously. Did she love Aaron, truly? Rachel had eighteen whole years of experience to draw on. Lots of arguments over who got to use the bathroom or whose turn it was to do the dishes. Shoving for space in the backseat on long drives and bickering about what to watch on TV.

But also, there was the time that Johnny Markison -- that big, dumb bully -- had shoved her into the mud and Aaron had fought him for her. Sure, Aaron ended up with a busted arm and a split lip, but it was the thought that counted.

And for all the usual sibling rivalry there were lots of little gestures, too. Aaron always made sure Rachel got the last fry, the final piece of candy, the remaining sip of soda. He listened to what she had to say (even if he didn't like it). And once, when Rachel had been getting out of the shower, she'd caught her brother glancing through the slightly opened doorway and it'd made her feel all warm and twisty inside.

So yes. Definitely. Rachel loved her brother. In a way she hadn't even admitted to herself until that moment.

"Good," Mrs. Genesee said, clasping her hands and smiling, warmly. "I need you to come with me."

Rachel gathered her things and followed the teacher out of the classroom. She felt the eyes of everyone in her grade watching her as she went out. It was weird, but Rachel was focused on what her older brother might need. Something about Mrs. Genesee's attitude, her odd question, let Rachel know that the situation must be quite serious.

Rachel followed Mrs. Genesee down the hallway, each side lined with lockers. Everything was eerily quiet with everyone else in class. Their footsteps, especially Mrs. Genesee's heels, clicked loudly on the floor.

"I must say, you're very pretty, Rachel," Mrs. Genesee said, out of nowhere. "And your body!"

Despite the random comment, Rachel felt flattered. Compared to the beautiful, statuesque teacher, Rachel -- short and broad-shouldered with a big chest and bottom -- felt quite awkward. Ill-formed.

"Oh no," Mrs. Genesee said, "I'm the one who's jealous. When I was your age, I'd have killed to have such, um, generous assets."

Rachel regarded Mrs. Genesee. The woman was tall and thin, with long, straight blonde hair so light, it looked almost white. Her large blue eyes and soft, breathy voice gave the teacher an expression of permanent sweetness and warmth. Like a teacher out of an old-timey TV show.

"You're eighteen years old?" Mrs. Genesee asked, not acknowledging Rachel's obvious staring.

"Yes, ma'am," Rachel said. It had felt like a ma'am moment. "You're also, like, super beautiful. I always thought so."

"Oh, thank you," Mrs. Genesee said. "I must say, Aaron's very lucky to have a sister like you."

Rachel assumed that Mrs. Genesee was referring to Rachel's willingness to help her brother out, but she flushed, nonetheless.

"Today, Aaron has a special senior project," Mrs. Genesee explained, "Ordinarily, you'd find out about it next year. But your brother's partner is out sick, so he needs you to step in."

"I'll do anything for Aaron," Rachel said, meaning it. It seemed that acknowledging her love for her brother had opened the faucet of her feelings and now they were overflowing. She fixed her glasses on her nose -- they were sitting fine, but it was a nervous habit.

"I'm so happy to hear you say that," Mrs. Genesee said, "You really do love him, don't you?

Rachel found it hard to respond, so she nodded, feeling her cheeks warm.

They got to the other classroom and opened the door. It was almost a mirror image of the one that Rachel had just left with rows of desks facing a chalkboard wall. The fluorescent lights almost painfully bright compared to the relatively darker hallway. The room was completely full of students. All of them sitting quietly, as if Mrs. Genesee had put the room on pause while she was gone.

Rachel's eyes immediately alighted on Aaron. He was hard to miss: standing at the front of the room, separate from the rest of the class. He kept his hands clasped in front of him, almost penitent. He saw Rachel and his eyes widened.

He looked away, shyly.

"Hi," Aaron said to some window behind him.

Aaron was broad shouldered with shaggy, brown hair and a crooked smile. His beetle-black eyes always looked like they were calculating something. Like the gears of his mind were in perpetual motion. He had thin lips and his chin had the beginnings of stubble. He looked very manly; Rachel had always thought so.

For herself, Rachel had more of their mom's looks with thick lips, large blue eyes, and a retrousse nose. Her hair was the same color as her brother's, that boring light brown, but she wore it long, down to the center of her back.

"Mrs. Genesee said you needed my help," Rachel said, well aware that she was talking in front of a room full of kids. She put all her things down by the blackboard. "I'm glad I can be here for you."

"Uh huh," Aaron said. He clearly felt quite sheepish about all this. His cheeks were adorably pinking, and his dark eyes couldn't meet hers. "Thanks."

Now, the rest of the room came into focus for Rachel. She recognized most of the students sitting there, of course. It was a tiny school in the middle of nowhere and everyone knew everybody else.

Of the girls, there was Kaylee Ryan, a stuck-up, blonde cheerleader girl. Amy Warner, a skinny, dark-haired goth who seemed to have a dirty look for everyone. And Taylor Charles, a redheaded chatterbox who was a star for the soccer team.

Rachel knew the boys, as well. Stupid Johnny Markison, muscular and tall, who gave Rachel a most curious smirk as her eyes found his. Noah Kirk, a tall, studious boy with dark brown hair who Rachel had a bit of a crush on. Mason Derricks, short and chubby; a sweet, quiet kid with dirty blonde hair.

Altogether there were 6 students in the room, all patiently waiting. Plus, Aaron and Rachel at the front, of course. Rachel couldn't help but feel a bit on display, like that.

"Well now," Mrs. Genesee said, stepping fully into the room and turning to the class, "As I was saying, Aaron's partner, Lilly Parkinson, is out today with the flu so Rachel, here, has kindly volunteered to fill in for Aaron's demonstration."

She said that word, demonstration, oddly like it carried a much deeper meaning than Rachel would've ordinarily assumed.

"We're already behind on time, so let's get started right away," Mrs. Genesee said, "Rachel, why don't you come over here and sit on the desk."

There was a wooden table in front of the room, right in the center. Rachel she went over and pushed herself up on it. Like everyone there, she was wearing the school uniform of a navy sweater over a light blue blouse, with a blue-tartan skirt (well, the boys had dress shirts and slacks, but it was essentially the same).

Sitting on the desk, feet unable to touch the ground, Rachel felt a bit exposed. She held her legs tightly together so no one could see up her skirt. Rachel realized she was sweating for some reason. Her breath short. Yes, she felt on display like this and it made her nervous. Vulnerable. She looked over to her brother for support, but saw he was expressing those same emotions. It only made Rachel feel worse.

Mrs. Genesee either didn't notice or didn't care. "Aaron, go ahead and kiss your sister, to start."

Rachel's breath leapt out of her. Her heartbeat pounded in her head. What kind of weirdo class was this?!

It was clear from how Mrs. Genesee said kiss that she didn't mean a little peck on the cheek, either. At the same time, the way the thin, blonde teacher said the words so casually, made it also seem like such an act wasn't that big a deal at all.

Rachel's eyes flitted back to her older brother, who was standing at the side of the desk. But instead of seeing the expected look of shock, horror, or disgust, Rachel saw that Aaron was remarkable unperturbed by this request. Oh sure, he was blushing like nobody's business. And he still couldn't look his little sister in the eye. So, he was nervous. But the request itself? It almost seemed like Aaron had anticipated it.

Which was odd. Rachel had never kissed a boy at all. Having a first kiss in front of the class was already a lot to ask. But to also have that first kiss be with her brother. That seemed like a lot. And Rachel wasn't the only person who thought so.

"Mrs. Genesee, they're brother and sister!" Taylor Charles, the athletic redhead exclaimed. "That's..." she whispered the last word, like merely speaking it aloud was a sin. "Incest."

"Taylor!" Mrs. Genesee stood, hands on her hips. Her once-soft demeanor went stony. Something about that transformation made it even more intimidating. "Have you already forgotten about the class pledge?"

"Sorry Mrs. Genesee," Taylor said, looking shamed. Her face nearly as red as her hair. She said the next words almost as a mumble. "Whatever happens here, we don't talk about it. Or judge."

"Correct. And why is that?"

"Being an adult comes with adult responsibilities," Taylor said, as if reciting a rehearsed speech. "But adult things like this can't be learned from books or lectures. So instead, we demonstrate together. So, we can all share and learn equally."

"That's right," Mrs. Genesee said. She was back to her sweet, mothering self. "Of course, if you'd prefer, we can go back to using the textbook, instead."

The entire class groaned. Whatever was in that book, Rachel realized it had to be terrible.

Mrs. Genesee's smiled, warmly. "I'm glad to hear you all feel that way. But remember, this is all about being adults. That means doing these things, yes, but also being respectful and displaying proper comportment. Everyone's going to be up here at some point. Think about how you'd like your own demonstration to go. Taylor, I believe your turn is in two weeks. I know you'll want to be treated with the same respect as Aaron and Rachel today, right?"

"For sure," Taylor said. She was grinning, like all was right with the world.

"Now, I agree that this is more unconventional than anything we've viewed so far," Mrs. Genesee said, "But there's nothing to be done about it. We can't postpone. So, unless anyone is willing to volunteer to do a double..."

Everyone in the class found something far more interesting to stare at around the room.

"That's what I thought," Mrs. Genesee said. "OK, Aaron, you may proceed."

Rachel's handsome older brother walked right up to her. His thighs pressed against her knees. His dark eyes searched the floor. His cheeks seemed to be perpetually pink.

He muttered something, but Rachel was too distracted by the stress of all this -- the look in the teacher's eyes, the penetrating stares of the other students, the thought of what was about to happen -- she couldn't pay attention.

Aaron repeated himself. "Sorry," he said, "I'm sorry about all this." His voice was so quiet, he was almost whispering.

For all that her brother was tall and handsome, and super smart, Rachel knew he was almost terminally shy. Standing in front of the class like this had to be hard enough. Let alone now having to do what they'd been asked.

Rachel realized, then, that she had to be there for her brother, in a way that went beyond being in the room. After all, they already had six other students (plus a teacher!) to make them both feel uncomfortable. Wasn't it her job to be the single safe face?

"It's fine," Rachel said, "Truly, Aaron. Honestly, I'm happy I can do this for you. And besides, it's just one silly kiss."

"One kiss," Aaron said, with a wry grin. "Right."

He met his sister's bright, blue eyes for the first time. Put his hands on her shoulders, stiff and awkward. Leaned forward. Rachel gasped, but before she could get her breath out, it was swallowed by her brother as Aaron pressed his lips to hers.

It was quick. A peck at best. Weird and hard; clinical and off-putting. Not at all like what movies and books had made Rachel believe a kiss would be like. It was awkward and uncomfortable, like being kissed by a family member. Which made sense, since that's what was actually happening and all.

Still, Rachel was disappointed. It was her first kiss after all. And having it be so, well, crappy was kind of a letdown. Oddly, she felt a bit guilty, too. Like she was letting the class down as well. Wasn't it her job to help demonstrate a real kiss?

Mrs. Genesee must have felt the same way, because she gently pushed the siblings apart with her hand.

"Come now, Aaron," Mrs. Genesee said.

Again, a bit of sternness filled her otherwise sweet voice. Just that little bit of reproach, barely enough to earn the word, already had Rachel terrified. The fact that the rest of the room also seemed frozen by Mrs. Genesee's tone only made Rachel feel worse.

"I expect a little trepidation from dear Rachel," Mrs. Genesee said, that hint of ire already melted away. "But we both know you can do better than this."

"I'm sorry, um, ma'am." Aaron stuttered out. "It's only that, um, well. It's my sister and I..."

"I've seen you give plenty better kisses with Lilly," Mrs. Genesee said.

Rachel startled at that. Aaron had been kissing Lilly? She was surprised, feeling weirdly deceived. And also, perhaps most inappropriately of all: jealous.

"Yeah, but that's Lilly and this is..."

"Your sister," Mrs. Genesee said, "A woman you actually love. Or did you fib before about your feelings?"

"No," Aaron said, "Definitely not."

"OK then," Mrs. Genesee said. She stood back, arms crossed under her little breasts, as if her point had been more than made.

Aaron sucked in a breath, sharply. He looked at his sister. "Sorry," he said, "Again."

He leaned forward and pressed his lips to Rachel's. This time was better. A low bar, but still. His lips felt soft. His mouth more welcoming. His hands tight around her shoulders.

Rachel let herself tumble into it. She forced herself to forget the other kids in the room, the teacher judging. She let the fact that it was her brother slip her mind and instead focused on the act of affection to someone she did, truly, love.

Aaron seemed to be pulled forward as well. His mouth opened and they *smacked* lips, wetly. His arms contracted and wrapped around Rachel's back. What had been robotic became heavily, inescapably, passionate.

Rachel felt her brother's tongue press at her lips, and she let him slide it inside her mouth. Whoa! Now this was a kiss!

"Wow," Taylor, the athletic redhead, gasped.

"Nice," Noah, the brown-haired boy who was Rachel's on-and-off-crush, said.

"Aww." Kaylee, the blonde cheerleader, cooed. "So sweet!"

"Gosh," the shy, chubby boy Mason said.

Rachel even heard the judging, goth girl, Amy make a sort of satisfied 'hmmm.'

"Whatever," the bully, Johnny Markison said with disdain. It was almost as much of a compliment as all the nice things the class was murmuring.

And yet, it was only when Mrs. Genesee nodded her approval in Rachel's peripheral vision that the girl let herself feel like she'd truly succeeded at the task.

"Much better," Mrs. Genesee said.

And Rachel's heart swelled with happiness from the simple compliment. The power this woman's approval seemed to hold over her, it only made this experience feel all the more eerie. And that was saying something because it was certainly weird as heck on its own.

Rachel felt Aaron start to pull away and she made it clear -- with her own lips and mouth and tongue -- that that was unacceptable. She put her own hands on her brother's flank. He felt solid. Strong. The rise and fall of his breath was short and needful. She let herself get lost in the slippery connection between them.

"Yes, good," Mrs. Genesee said, "I think you can move on now."

Rachel let out a sigh. On the one hand, she felt like she could kiss her brother forever. But having this finally over with was a relief as well. It was only a kiss. And quite easily accomplished, after all. Rachel was looking forward to going back to her own class.

But Aaron didn't release his sister from his grasp. Instead, she felt his hands slide down her back and grip the hem of her sweater. And, suddenly, Rachel found herself feeling a very different emotion, entirely. One that she couldn't put a single word to. Fear-excitement-shame-anticipation. Fexshipation. That.

Maybe Aaron was going through the same thing. But he was too busy kissing his sister and groping at her clothes to express it. It was a strange, scary thing -- Aaron was the instigator of all these feelings but also her only safe space in the room.

Inevitably, Aaron started lifting Rachel's sweater upwards. Rachel felt her heart race faster with every inch of her blue blouse that her brother exposed.

"Lift your arms, sweetie," Mrs. Genesee said. Even her sweetness now tasted oddly sour. The way too much sugar can make your stomach turn.

Rachel didn't want to do any of this. She told herself she was being silly -- it was just showing her dress shirt, after all. She wore less in phys ed. But it was the implication of the act -- all the subsequent steps it implied -- that had her desperate to run away and hide. Squeeze her eyes shut and make the entire world teleport away.

But Rachel did none of those things. Instead, to her surprise, she did exactly as she was told. Aaron broke their kiss to pull the sweater over his sister's head. He tossed it off to the side, like it was nothing more than a rag.

The kiss broken, her sweater on the floor, Rachel's eyes refocused. Mrs. Genesee was standing by the far wall, arms crossed. The rest of the class was staring right at her, enraptured. The hungry looks in their eyes. The judging stare of the teacher. The loving expression on her own brother's face. Rachel suddenly felt nauseous. Like dropping down the steep hill of a rollercoaster. And the next climb seemed very high indeed.

What was happening? Where was this headed? With the kiss and the sweater and-

"Hmph!" Rachel squeaked as her brother covered her mouth with hers.

"It's OK," he said, between lip smacks. His voice like a breath over her ear. "I'm here. It's OK." Clearly her older brother had sensed her discomfort and was trying to help.

But what was OK? That was the problem Rachel couldn't escape. What was the 'it' exactly that was supposedly OK?

"I understand," Aaron said, clearly showing that he didn't at all. "It wasn't supposed to be you. It's awkward and weird and I'm feeling it too. You didn't even get to do any of the earlier stuff."

"You all did this?" Rachel asked. The siblings were speaking quietly. It was unclear if they were indeed having a private conversation or if everyone else was simply too polite to acknowledge it.

"Well," Aaron hesitated. His kisses moving from her lips to her cheeks to her ears and even her neck. "We all kissed like this, yes. And did some, um, other stuff. But today... Well, a couple of the other couples have already gone. But most people haven't yet."

"I still don't get it," Rachel said.

"It's supposed to teach us well, you know," Aaron said. Rachel didn't need to see her brother's face to know he was blushing again. "When a man and a woman..."

Rachel let out a gasp she didn't know she'd been holding.

"Yeah," Aaron said, "That."

"Oh," Rachel said, "Oh my. And we're supposed to do that? Up here. Now? In front of the whole class?"

What men and women do together. That's what he'd said. Oh my. That was terrifying. Awful. Exploitive and wrong. And with her own brother besides? It felt like stealing a car in order to commit a murder to start a war. One wrongness on top of the other to the point that nothing mattered any more. Whole world flipped inside out.

But then why was Rachel's surprisingly molten sex pulsing in time with her heartbeat?

"We only have to do it a little," Aaron said, a little-boy whine escaping his lips.

And some dumb part of Rachel's brain actually said, well, if it's just a little.

"And if I don't want to do that?" Rachel asked, as if she hadn't already convinced herself.

Aaron flushed. "It'd be bad," he said, "I mean, embarrassing for sure. Mortifying. And we both kind of said we were OK with it, right?"

Oh right. The love thing from before. Was that what Rachel had been doing? Agreeing to whatever all of this was? Oh my.

"If we stop now," Aaron continued, "It'll look like we weren't, you know, being honest with Mrs. Genesee. We could both get in a lot of trouble. Plus, I'd get a bad grade."

Well, when Aaron puts it that way. Rachel took a deep breath. She wasn't physically restrained; no one was holding her in place. But she may as well have been for all the options she had. This was happening, whether she wanted it or not. So, she decided she might as well find a way to enjoy it.

"What are we supposed to do next?" Rachel asked.

"You're sure?"

"I am."

How bad could it be? Something to share with the psychiatrist sure, but that was decades away. And, in the meantime, kind of fun? It's not like they were going to full-on fuck in front of the whole classroom. A little heavy petting or whatever would be fine.

Aaron was demonstrating, despite his earlier flub, that he was a very nice kisser. And Rachel was beginning to wonder, with an idle feminine curiosity, what might be behind her brother's own sweater.

Aaron couldn't keep the happy grin off his face. Clearly, his little sister's approval meant so much to him. "OK, so like, we can trade off or, ummm, do the whole thing one at a time?"

"Still kissing though, right?" Rachel asked.

"Yes."

"How did you and Lilly do it?" Rachel asked, doing her best to keep the envy out of her voice. Why should it bother her that her brother had kissed some other dumb girl? But it did. "When you two practiced and stuff."

"Well, we never... I mean, this is about as far," Aaron's words were getting ahold of him. "Let's trade off."

"So, I should take your sweater off," Rachel said.

"Yeah, you can do that," Aaron said.

Rachel reached for the bottom of her brother's sweater and lifted it up, over his head. It wasn't that big a deal, really. He had on a long sleeve dress shirt under there that kept him quite covered. But Rachel got more of a sense of his body beneath and, again, couldn't help but wonder about it. In what was surely a quite non-sororal way.

"Now what?" Rachel asked. She tried to keep her excitement out of her voice.

It was a strange sensation, sharing this with Aaron. Letting him lead her through it. Like he was teaching her to play Crazy Eights rather than slowly stripping his sister down in front of a classroom full of kids.

"Your - ahem - your shirt," Aaron said.

Rachel nodded, seriously. "Do you have to do it or can I?"

"Wh-whatever you want."

Rachel paused, fingers perched above the first button of her blouse. "You like this don't you?"

"What? No, of course not," Aaron said, "I mean, OK, you're really pretty and I don't..."

Rachel giggled. There was something so enchanting about how Aaron's eyes seemed incapable of leaving the spot where her shirt was about to split. She felt like a goddess. Or maybe a succubus. Powerful and controlling.

"It's OK," she said, "I'm only teasing you."

Aaron let out a breath and nodded. Her shy brother was adorable. "The class talked about that too. The teasing. It's fine. I kind of like it, I think."

Rachel undid the top button of her blouse. Then the next. Pop-pop-pop. By the end, something that had seemed like such a huge step had become mechanical and almost rote. Until she remembered she was doing it in front of an entire classroom.

Aaron must have sensed his sister's sudden trepidation. He reached up and pulled the shirt off Rachel's shoulders. He dropped the blue blouse in a wad at their feet.

Rachel heard the whole room let out its breath at once. Fuck. Like all her fears roaring to life all at once. She was sitting on a desk, in nothing but a bra and a tartan skirt. No one had seen her this naked before. And it seemed her brother wasn't the only one who was captivated by her.

"What a set of honkers," Johnny the bully said.

"Oh wow," Taylor, the athletic redhead said. "That's hot."

Mason, the chubby boy, looked like he was about to have a coronary. His face was so bright red and sweaty.

Amy the goth girl, on the other hand, just gave a little shrug and turned to look out the open window.

Noah, Rachel's crush, caught her eye and gave her a warm, little nod.

"That's so nice," Kaylee the blonde cheerleader said with a sigh. "The two of you have such great chemistry."

Rachel knew her bust was, well- Large was certainly one word for it. Prodigious seemed more appropriate. Her bra was dark and lacy, but mostly it was built for function because it very much needed to be. She hadn't even realized underwear came in those sizes, went that far down the alphabet, before her mother had ordered this one online for her.

Rachel felt her face grow hot. The room of high school students eyed her like they were all starving, and she was a steak. Even Mrs. Genesee, who, when she noticed Rachel was looking her way, gave the brunette girl a lascivious wink.

Rachel tittered again. "Your turn?" she asked, if anything just to change the subject.

"Yuh-yeah," Aaron said. His fingers trembled as he tried to undo each of his buttons. Aaron mumbled to himself. "Don't know why this is so difficult."

It seemed like a small thing, taking a shirt off. Unlike his sister, Aaron would be showing his bare chest. But, also unlike her, it was something the world had seen many times. That didn't change what the reveal really symbolized: exposure. Vulnerability. An acceptance that things were about to get very much more real.

And Rachel understood that. Because she was going through the same racing emotions. She stilled her brother's hands. Looked into his deep, dark eyes.

Rachel gently put her hands over Aaron's. Soothing and supporting. She heard a soft awwww sound come from the room and she was pretty sure it was Kaylee who'd made it.

"I've got you," Rachel said.

Poor Aaron was practically hyperventilating now. "I'm. The one. Who's supposed. To be. Helping you," Aaron said through catching breaths.

"We're helping each other," Rachel said. She leaned forward and kissed her brother, surprising herself with the ardor of the act.

"Yeah," Aaron said, "Yes. OK."

The both of them went down the buttons, opening each one. Rachel was shocked at the sudden intimacy of it. A closeness that went deeper than a mere sibling connection. Finally, the last button came loose.

In a mirror of what he'd done for her, Rachel slid her brother's shirt off his bare shoulders and let it drop to the floor below.

Aaron was still breathing hard, panting like he'd been running. His chest had a lean, spareness to it -- lithe and tight -- in a way that made Rachel's whole body grow warm. His little pink nipples screwed up tight like he was cold. But the room was quite warm.

"Oooo," Taylor said. Her one hand rested curiously near her breast.

"Nice," Kayleee said.

Even Amy let her dark-tinted lips twist in a look of disdainful appreciation. Noah and Mason, on the other hand, were trying very hard to make it look like they didn't care.

"Get to the good stuff!" Johnny yelled.

Mrs. Genesee tutted her tongue at him. "We don't need that kind of behavior here," she said.

"But it's boring," Johnny complained, "Who wants to see his scrawny ass, anyway?"

"Well, I think Aaron has a nice body," Mrs. Genesee said. Her clear appreciation got Johnny quiet quickly.

Rachel hardly noticed, however. She was lost in her own world of appreciating her brother's bare chest. She wondered what it would feel like under her fingers. Then, with the excited surprise of someone waking up Christmas morning, she realized she didn't have to imagine it.

Rachel ran her fingers down Aaron's shoulders, over his pecs. She felt his flat tummy with just a bit of brown hair on it. The sharp little points of his nipples. His skin felt soft and warm. His muscles strong and hard. A wonderful mix of magical contrasts that set Rachel's whole body on fire. Especially one particularly squishy part between her thighs.

"Top or bottom?" Aaron asked.

Huh wha?

"I can take off your, um, your bra," Aaron said, "So we're both. You know. Or you can keep it and do the skirt next."

"Wait a second," Rachel said. Something else had been sitting in her mind before her brother interrupted her and she wasn't going to let him hold her back.

Rachel kissed her brother's neck. Then she traced her lips over his traps and down his pecs. Her mouth alighted on his nipples, and she let herself suck a little.

"Oh my," Aaron said, an almost perfect match to how his sister would speak it. He ran his hand behind her head, fingers entwined in her brown hair. "Oh my."

"OK," Rachel said, sitting straight up and looking oh-so pleased with herself. "You were saying?"

"Tuh-top or..." Aaron's ability to make whole words was clearly impaired.

"Top or bottom. Right."

As much as Rachel was now very much anticipating her brother's turn on her bare chest, she was less confident about taking her huge breasts out in front of the room. Her mom had always told her that boys liked big boobs, but Rachel thought they looked ridiculous. She wasn't looking forward to the looks she would get from the pretty (far prettier than her, in Rachel's estimation) girls with perfectly normal-sized bosoms, either.

Considering all of that, sliding off her skirt seemed way safer.

Rachel didn't wait for her brother. She grabbed the side zip of her tartan skirt and ripped it down. Then she shimmied the itchy cloth out from under herself and tossed it to the side.

This was fine, truly. She was only really showing her legs, after all. And her pale-yellow panties. But they kept her most private place well covered. This would have been nothing, not even worth a blink, except for one mortifying thing: the huge dark, wet spot in the gusset of her underwear that Rachel had now revealed.

It looked like she'd peed herself. Rachel, in fact, seeing that huge stain, started to wonder if maybe she had done it and missed it with everything else going on. But no. It was her own, um, personal lubrication. Rachel quickly snapped her legs closed, hoping no one had noticed.

If they did, the class didn't say anything. All of them were staring up at the siblings, rapt. Taylor's hand was on her own breast now, kneading and pinching in a way that was not at all subtle. Speaking of obvious, Johnny's hand was right on top of his pants-covered groin. Noah kept shifting around in his seat, like he had to use the bathroom or something. Kaylee was doing the same thing. Mason was cautiously rubbing his crotch against the leg of his desk. Heck, even Mrs. Genesee's face was flushed, and she had her arms crossed under her boobs in an oddly suggestive way. Only Amy seemed disinterested, but she kept drumming her fingertips on the top of her desk, rhythmic.

"My turn," Aaron said. He looked down at his sister, warmly. He said it again, like psyching himself up. "My turn."

But before he could start, Rachel pushed his hands away and undid the pants, herself. Aaron's navy slacks puddled on the ground at his feet. Rachel smiled, hungrily, at her handiwork. She found Aaron looking back at her. A little bit of worry behind those dark, affectionate eyes.

Like it was magnetic, though, Rachel found her attention drawn inextricably back to her brother's dark boxer shorts. There was no telltale wet spot there. But there was no hiding his arousal, either.

Aaron was very (very) erect. Whatever was under that underwear was pitching a tent good for a three-ring circus. Tall enough to contain a giraffe, wide enough for an elephant, and hard enough to support any number of gymnasts. There was that fexshipation word again. As if Rachel's panties weren't already soaking enough.

At least I can hide my arousal somewhat, Rachel thought, poor Aaron is out for the entire universe to see.

"Let's GO!" Johnny called out, unkindly.

"Ahem. Johnny, we've talked about being polite," Mrs. Genesee said, shifting on her hips, "But we really do need to be moving on."

Aaron let out a nervous laugh. Rachel shared it with him. They were down to the last of the last. Still not completely naked. What was the cliche? 'Nothing you wouldn't see at the beach.' But in a moment, they'd be way past that. Way way past. In a way that Rachel had never seen before, let alone lived.

"Have you ever?" she asked, her intention clear.

"Not completely," Aaron said, "No. This is the, um, farthest we ever went. Except for, like, some stimulation stuff."

Rachel cocked an eyebrow.

"Rubbing," Aaron said, "Always over clothes, but um..."

Rachel ran out of eyebrows to raise. Holy fuck! Were they going to be expected to do that? But another part of Rachel's mind replied immediately. Duh! Of course they were -- why else would the clothes be coming off? Oh God.

Aaron put his hand on his sister's shoulder. She could tell he was about to ask her his now-favorite question.

"Let's do me first," Rachel said.

Aaron nodded. She could tell he was feeling his own mishmash of emotions. Relieved at the reprieve for his own genitals. Absolutely electrified at the thought of seeing his sister's. It was flattering. In a way that also felt wicked.

Rachel let her brother fumble at her bra strap till she finally gave up. She didn't see the big deal, but Aaron acted like he was breaking into a casino vault. So, Rachel reached behind herself and snap-snap-snap-snap she was free.

Her massive breasts spilled forward. Her nipples sharp and blood-red from arousal. The class literally gasped.

"Hot damn!" Johnny exclaimed, "Honkers my hairy behind. Those are damned dodeca-honkers. Bazongas or some shit."

Rachel felt herself flush from her chest to her cheeks. Something about how the bully eyed her made her feel particularly embarrassed.

"Now class, we've talked about this kind of behavior," Mrs. Genesee said, "Every person is different and that's OK."

"Yeah, but like, her boobs are extra big, right?" Kaylee said.

"They are on the larger side of the scale, yes," Mrs. Genesee said.

"Her tits are fucking awesome, is what they are" Taylor said, then threw her hands over her mouth. Like she couldn't believe her own brain.

"They are quite nice," Noah said.

"Uh huh," Mason said. He nodded his head, flesh pale, like the mere sight of Rachel's breasts was causing a coronary.

"They're not that big, jeez," Amy said.

Aaron was entranced, as well. Whether it was the size, or just the fact that he was now looking at his sister's bare boobs, the boy looked absolutely entranced. Like a man possessed, he reached out and hefted them in his hands. Then he knelt down and started to suckle on one of Rachel's nipples.

Rachel, herself, didn't see much point in boobs. Beyond the obvious biological need. In fact, she found the massive size of her chest to be an annoyance more than anything. But when her brother latched on, she felt electricity spark down her spine. Run straight from her tits to her pussy. And, yeah, suddenly she could see what all the excitement was about.

Aaron worshiped at his sister's tits for as long as she would let him. But finally, she could feel Mrs. Genesee's watchful eyes and realized she needed to break this up. Without any further fanfare, Rachel pulled her canary panties down her legs. She swore she heard a wet splat as they hit the ground, but she knew it was just her morbid imagination. Probably.

For all the excitement around the reveal of her chest, removing her underwear was remarkably subdued. Rachel had a full brown bush, barely trimmed, over a pair of chubby, almost pouty outer labia.

No one commented or said anything. Rachel reflected in some ways that this was actually more demure. After all, there was no obvious cue to how wet she was now that her stained underwear was gone. It was harder to see that she was dripping like an open faucet.

Rachel could smell it, though. The whole room stank of sex. Heady and dizzying. Like they were all marinating in hormones and pheromones. And many other pleasurable moans to come.

Aaron nodded at his sister's nudity with an officious air. Rachel realized that he now also had to get completely naked, and it was freaking him out. She decided to help him. But not in the way she'd been doing to this point. She wanted her brother to feel the same adoration he'd showered on her own body.

"Take it out," Rachel whispered. Her voice huskier than she'd intended. Ragged and raw.

Aaron looked at his sister, surprised.

"Really?"

"Please," Rachel said, putting the right amount of desire into her voice. "I want to see it so bad."

Rachel might have been playing things up for her brother, but she wasn't exactly exaggerating. She really did, desperately, want to see her brother's member. Since she'd seen his massive erection under his boxers. Since they'd started kissing earlier. Since, if she was being honest, some long time before. Lusting after her brother, knowing it was wrong, but wanting him all the same. Only now, finally, able to vocalize that desperate desire.

"Show me your big, awesome cock, brother," Rachel said. She had a sense that saying that last word would spark him, and boy was she right.

Aaron nearly fell over trying to shove his underwear off. His dick popped free. Hard as all hell. Thick and long, with dark veins and an angry, pulsing head. This time it was the girls' turn to get excited.

"Fuck me, talk about a donkey cock!"

"Taylor!" Mrs. Genesee snapped. She took a deep breath. "Well, to be fair, that is quite impressive." Her voice seemed as shaky as Rachel's had been before.

"I don't think I could, um, handle something that big," Kaylee said.

"Oh please, you could probably take two of them at the same time, you big slut," Amy said.

Kaylee gasped, angry. Then made a show of going into a big pout. But a little grin played at her lips. Like she was picturing exactly what Amy was describing.

"Is it-?" Mason stuttered, "I mean. That's not normal, right? All things considered? Plus, I thought size didn't matter all that much."

"It matters when you've got a monster like that," Taylor said, then muttered to herself. "I knew I should've volunteered to help Aaron today."

"Whatever," Johnny said, "It's just a dick. Who cares?"

"I bet Rachel cares quite a bit," Noah said with a smirk.

"I ain't never had any complaints," Johnny said.

"No compliments either," Kaylee said, sticking out her tongue.

"Class, please," Mrs. Genesee said, "You're interrupting our couple."

But Rachel wasn't disrupted at all. She was staring, mouth agape, at her brother's massive tool. She reached out to hold it. So hard, yet soft. Burning hot, yet wonderful to touch. She loved it to bits and never wanted to let go.

And it was her brother's.

"Um, Rachel," Aaron said. He looked both ecstatic and worried. "That feels nice, but... If you keep doing that, I'm going to."

"What?" Rachel asked, legitimately confused. She continued to rub and stroke her brother's dick like it was the world's best toy. Which, clearly, it was.

"Well, I mean. It feels really good. Like really really good," Aaron said, "And if you keep doing it, I'm going to, ummmm..."

"Shoot?" Rachel asked. "Oh, I want to see that!" She started rubbing faster.

"Ummm. Ah." Aaron seemed to be trying to argue, but he'd lost the ability to speak.

"It's probably for the best, Aaron," Mrs. Genesee said, "It'll make the rest of this much easier."

"Well, yes. But-"

"Rachel, dear, go ahead and make your brother squirt," Mrs. Genesee said.

"Yeah? It's OK?"

"Yes honey, more than OK. Give Aaron the relief he needs."

"You've got this!" Noah cheered.

"Oh. Oh God, Oh Rachel," Aaron was rambling on. "So good. Oh, little sis. I'm going to... Oh fuck please don't stop."

He wrapped his own hand around Rachel's fist and showed her how she should stroke it. The eager sister resumed her motion with a wild abandon. Her heart racing in her chest. She wanted to see the finish more than anything now.

"See what a good job Rachel is doing?" Mrs. Genesee said to the class. "See what a wonderful little sister she is, making her brother feel good?"

The class grunted their agreement. Rachel didn't need to look to know they were all rubbing themselves, too.

"Oh Rachel," Aaron sobbed out, desperate with need. "It's coming. I can't stop it. Oh, I'm gonna cum so hard."

Rachel cradled her brother's head with one hand while she stroked him with the other. "I know. It's OK. Give it to me. Show me what a good brother you can be and shoot for me. I want to see it so bad."

"Oh fuck. Rachel. OHHHHH FUCK!!!"

Aaron's body bucked. He collapsed forward. His eyes rolled back in his head. He shivered, shook. Whimpered and howled into his sister's shoulder.

Rachel held Aaron close. Cooed and comforted him. Stroked his hair. "Oh yes, that's a good boy. Give it to me. All of it."

"Cumming," Aaron said, "Cumming for my sister. Oh, fuck Rachel it feels so good. Cumming for you."

Rachel felt something scalding splash against her chest. Another spurt, higher, all the way up to her chin. Warm essence leaked over her face and breasts. Again and again. Spilled over her fist as she slowed her stroking motion. Holy fuck this was amazing.

"That's it," Rachel said, "Oh yes. So good. You did so good for me."

Aaron's body went limp. He hung there in front of the classroom, and, for a moment, Rachel feared he was about to topple over. But then Aaron snapped back to consciousness. He looked at his sister and his eyes went wide.

Rachel looked down at herself. She was covered in brother-cum. Glazed. Dripping, slimy streaks ran all over her chest and face. Hands and legs. Her brother had done more than spurted on her, he'd practically drowned her in seed. The acrid, bleachy stench of it filled Rachel's nose.

Without thinking about it, Rachel slid her tongue out and licked a bit of the thick, white gloop that had spattered onto her cheek. It was quite gluey and very salty. Not at all pleasant. Yet something about the way it slid on her tongue made her want to taste more.

For a moment, Rachel got caught up in what this liquid actually was. It wasn't merely creamy fluid, after all. It was an ocean, an army, of sperm. Elixir of life. The semen of her sibling that didn't at all care that it was currently soaking into the skin of his very own sister. That wished and wanted, ached and swarmed, searching for a fertile egg -- no matter whose it might be. There was something visceral about being covered in all that thriving, writhing, fraternal fertility. Appalling and titillating all at once.

"Oh, fuck me," Taylor said, looking at Rachel's body. She had her hand down her pants and was openly strumming her pussy. "That is so fucking hot."

"Daayum! You must've been backed up for months, bro," Johnny said, "You've gotta let it out at least a couple times a week or you're gonna explode!"

"You kidding me? That's all Rachel," Noah said, "She set him off like a bomb. Magic touch, baby!"

"Is that, um, typical?" Mason asked. He'd raised his hand, a usual classroom behavior, but it seemed weird in the context. "To, you know, produce that much?"

"Well, yes and no," Mrs. Genesee said. Her face was bright red, and she was breathing hard. The points of her nipples pressed through her shirt. "It's definitely a, um, prodigious amount. But, um, not abnormal. Or anything."

Both siblings blushed similarly at the running commentary on Aaron's biology. And the fact that Rachel was slathered in it, besides.

"I think it's sweet," Kaylee said, "It's proof of how much he cares about his little sister."

"Yeah, that's what it is," Amy said, rolling her eyes.

Noah mouthed the words magic touch at Rachel and she giggled, despite herself. It was pretty awesome, actually. Although her brother's cum was getting cold and crusty. She asked for a towel to clean herself off.

"Well, this has worked out perfectly," Mrs. Genesee said as she handed Rachel a little white washcloth. It was like using a napkin to soak up after a tsunami, but it was better than nothing. "Aaron, you need time to recover."

Rachel looked over at her brother. He was standing to the side, leaning against the window. His naked body struggling with the effort of steadying himself after his epic orgasm. His penis was smaller than before. Amazing how something that was so huge could now be almost cute and tiny. Like seeing a skyscraper collapse, effortlessly, into something more like a teepee.

"And Rachel will need some stimulation to get ready," Mrs. Genesee said, clapping her hands.

Get me ready for what? Rachel wondered. If it was an orgasm like the one she'd just given her brother, she'd be more than fine with that. But it seemed like the teacher was talking about something more. Except Rachel got distracted before she could push that thought any further.

Aaron straightened. His once limp body now seemed eager to go. And he was grinning like a kid getting a triple-scoop ice cream cone. Impossibly eager though also (slightly) overwhelmed.

"I think you know what to do," Mrs. Genesee said, beaming.

"Yes!" Aaron cried out. He rushed to his sister, skidding to his knees in front of her like he was sliding into second base. "I can't wait to taste you, sissy."

Before Rachel could ask what her brother was so excited about, he'd buried his face between her legs. A rush of worry overwhelmed her. Her brother pressing his face into her pussy felt odd. Not wrong (well, to be fair, not more wrong than any other of the very public, quite incestuous acts the two of them had already committed). It was intensely intimate, and she wasn't sure she was comfortable with it. Rachel wasn't ashamed of her body, but her pussy was so drippy and squishy. Did she really want her brother's mouth there? In that most private of places?

But then her brother was lapping at her pussy with abandon and all those other emotions washed away with the ardor of his tongue.

The slippery wetness of her brother's mouth. The pulsing pressure from his tongue. The look of absolute adoration in his eyes. Rachel felt like her head was going to roll right off her body. And her brother had only started.

"Oh my GOD!" she shouted. She wasn't even aware she was going to speak until the words were out of her mouth. Everything else had been nice. Awesome even. But this was INCREDIBLE!

"Um, Mrs. Genesee?" This time it was Taylor who had her hand raised. "I was wondering if...?"

The blonde teacher smiled, kindly. "Yes, Taylor, of course you can."

"Oh, fuck YES!" Taylor shoved down her shorts and panties, revealing a thick, orange bush, and started rubbing herself with abandon.

"Class, you can all do what you need," Mrs. Genesee said. "Just be sure to keep your hands to yourselves. And clean up afterward, of course."

Amy looked over at Taylor and mouthed the word, "Slut."

Kaylee looked the other way, but she kept crossing and uncrossing his legs.

Both Noah and Mason looked uncomfortable but didn't do anything. Johnny, however, felt no such shame; he whipped his fat penis out from his fly and started flogging it. "Shit, this is fucking hot," he said.

Rachel, herself, barely noticed any of this because she was awash in a stormy ocean of ecstasy. It felt like her whole body was supplicant to the spot where her brother's mouth met her gaping cunt.

Aaron said they'd practiced rubbing; nothing as intimate as this. And yet her brother tongued her body with a deft expertise, seemingly more in tune with Rachel's rising needs than she herself.

Right as she realized she wanted his tongue in her vagina, he was already curling it inside. Before she could even think that she needed him back on her clit, he was sucking it into his mouth. And at the very moment she felt the rising pressure of a mind-blowing orgasm, it seemed her older brother knew the exact pace and stimulation to take her over the top.

She was there. She was there. She was THERE.

And then she felt it.

"Um... Mrs. um. Mrs. Genesee?"

Rachel wasn't sure how she'd even been able to form the words. She saw she even had her hand raised. She realized she must look quite ridiculous -- legs splayed on the desk, brother's face planted at her sex, formally asking her question.

"Yes dear," Mrs. Genesee said, "It's OK to let Aaron make you cum."

"No, um. I mean yes. But... Um. I have to pee."

And there it was. Of all the things and all the times. But Rachel couldn't deny the insistent pressure she was feeling right as her body rose to the occasion. She'd tried to ignore it, the persistent slosh of liquid ready to burst, rising in concert with her own orgasm. But now that Rachel felt the precipice close, she knew she needed to pause.

"No, you don't," Mrs. Genesee said.

Rachel did a double-take. Sure, it was annoying to need to piddle at that moment. And of course, the teacher was far more experienced in almost everything that was happening. But Rachel was pretty sure she knew her body's signals better than Mrs. Genesee.

For his part, Aaron went back to tentatively tonguing his sister's clit. It was like a little tickle, just enough to keep her engine running so she wouldn't sputter out. But, also, it was a reminder that Rachel really was about to burst.

"I think I do," Rachel said. She couldn't believe she actually had to argue this.

"I mean," Aaron said, clearly torn, "If she says she has to. I can start again. You know?"

"Tell you what," Mrs. Genesee said. Again, the sweet woman had become stern and it legit scared Rachel. "Let Aaron finish this part of the demonstration and, if you still have to go afterwards, I'll write you a hall pass. OK?"

Rachel felt the anger, the frustration, rise in her. This whole thing was ridiculous. But she found herself nodding her agreement.

Aaron nodded too. Or at least, he moved his head up and down, licking the length of his sister's pussy. Unbidden, Rachel let out a long, low groan. This pause should had slowed things down for her. But the electricity of Aaron's tongue was too much to hold back from for long.

If anything, the little break had only increased her need to cum. And it was certainly coming. Soon.

Again, Aaron tongued his sister to perfection. He lapped at her pussy with abandon. A driving, hungry desire. His eyes bright with wonder at his sister's body. It honestly didn't matter what he did now. He could have sneezed on her and Rachel knew she'd be blasted over the top.

Rachel had orgasmed before. On her own fingers but still. She knew the familiar signs. The clenching twitch, the rising heat, in her pussy. The ratcheting tightness in her legs and arms. How her eyes would crush down tight, like trying to squeeze the orgasm right out of her head.

This was so familiar, yet completely different. The wet pressure of her brother's mouth. The ardor of his licks and slurps. The sounds of the class around them, all watching and wanting at the same time. All of it made Rachel want to burst like never before.

The pleasurable pressure peaked. Rachel felt her whole body stiffen, like prepping for a pounce. And release.

"Ah AHHHH!" She let out a scream. Primal and unbidden.

The air exploded from her lungs. The ecstasy radiated from her center. And a thick plume of clear liquid burst straight out of her pussy.

"Ah fffFFUCK!!!! Oh fuh-fuh-fuck ME!"

It was a cry of frustration as much as pleasure. An exclamation of embarrassment and anger -- a shout of overwhelming bliss. She hadn't wanted to curse. But then, she didn't want to be doing this, either. And she definitely was.

Another arc of liquid squirted out as her pussy contracted. Another spurt of pleasure rocketed from her curled toes to the top of her head. Distantly, she had a sense of her body. Shaking, juddering, there on the table. Her brother's cheeks squished between her thighs.

The orgasm was sharp, short. It hit Rachel so hard it almost hurt. An explosive burst that cracked her skull and shattered her body. Made her brain throb. The peak of it beyond anything she'd ever given herself.

Rachel fell back onto the desk with a painful thump. Something crashed and she couldn't care what. Dazed, Rachel lifted herself up again on shaky arms. The whole room seemed brighter than before. The air ragged in her lungs.

Rachel saw her brother first. Oh God. His face was absolutely painted in her slippery pleasure. Cheeks and chin dripping. He was smiling, a big goofy grin.

"Oh my God, Aaron, I'm so sorry," Rachel said. Not even thinking about the rest of the room.

"Eww!" Kaylee said, "She pissed all over him!"

Rachel felt her face go red. Like this wasn't already so embarrassing. Did she need Kaylee to make her feel worse?

"She most certainly did not," Mrs. Genesee said. It was the crossest Rachel had ever heard the teacher sound by far.

"Well, something sure as hell shot out and soaked him," Johnny said.

"Some women produce liquid during orgasm," Mrs. Genesee said. Clearly trying to sound as clinical as possible. "It's perfectly natural. And definitely not urine."

Aaron reached a finger up and scooped some of his sister's liquid off his face to taste. "Doesn't taste like pee," he said, with the seriousness of a sexual sommelier.

"That was so hot," Taylor said, "Do you think I could squirt like that?"

"It's possible," Mrs. Genesee said, "There isn't a lot of research on the subject. But some people believe that any woman can squi- produce liquid like that. If properly stimulated."

"I'd be mortified," Kaylee said. But she knew to keep her words to a whisper this time.

"It's weird," Johnny agreed, "But also super-hot."

"Sexy as hell," Noah said.

"You're making me do that when it's my turn," Taylor said, turning to Mason. Apparently, they'd been paired.

"Um, OK," Mason said, "I'll, um, try."

Amy snorted, holding back a cruel laugh.

"Whatever, bitch," Taylor said, "You wish you could do that."

"I do it all the time," Amy said. Then she paled (even more than usual) when she realized what she'd confessed to.

"Well, this has been a very educational session all around," Mrs. Genesee said, "But I'm afraid we can't wait any longer. It's time for the last part of Aaron's demonstration."

Rachel was still in post-orgasm bliss (with a bit of lingering post-squirt embarrassment). So, she didn't completely pick up what Mrs. Genesee had just said. Then the words made it from her ears to her mind.

Last part?! What could that possibly be? Surely Mrs. Genesee couldn't mean...

Aaron stood up, a huge grin parting his sticky face. Rachel's eyes couldn't help but catch on her brother's giant cock, now back at full strength. Fuck, somehow it looked even bigger than before. How was that possible?!

Her older brother stood between her legs, confident. Resolute. Where was the nervous boy from before? Had everything that afternoon finally broken him free? Or was his animal need, his essential drive, finally taking hold?

Aaron looked into Rachel's eyes. "Ready?" he asked. He was holding his dick, lightly stroking it against his sister's pussy lips.

Her brother was about to commit that most incestuous act. Well, they both were, really. They were going to do it. IT! In front of the entire class. All those kids. Mrs. Genesee. They were all going to watch while Aaron put his hard cock inside his little sister. And Rachel was conscious enough to realize that it was going to be for more than a feel.

But Rachel also became clearly aware of something else. She wanted it. Desperately. Rachel's body, despite the orgasm (maybe because of it) needed her brother's steaming hot hardness to part her lips and fill her up inside. Her pussy was painfully aware of how empty it was. Begging to squeeze down around her brother's member.

Aaron's own desire was painted across his face, as well. That he was putting his penis inside his sister, the wrongest of the wrong, didn't seem to bother him. His bare cock, slid right into his sister where it would... Oh no.

But that thought was literally pushed away as Aaron lined his cock up with Rachel's pussy and slid it right into her waiting hole.

It felt like a slight stretching at first. Then a pulsing burn as the warm invader penetrated Rachel's inner sanctum. Painful, yes. But also, quite wonderful. Like Rachel could feel the inherent pleasure of it, if only her body could adjust to the pain.

Still, the pressure kept going. Well past when Rachel thought it would have stopped. Plunging deeper into her sex until, she swore, it felt like her brother's searing steel was poking into her belly.

"Oh God!" Aaron cried out. "Oh sissy, you feel so good."

"Uh huh," Rachel said.

The siblings clutched each other tight. Rachel's naked legs wrapped around her brother's waist. The desk was cold under her bare butt. Aaron's feet firmly planted on the floor. His arms wrapped around her back like letting go would leave him to drown.

Aaron shoved forward a bit more. Rachel let out a little sob. She was very aware of that intimate connection. Felt herself tiny and thin around her brother's shaft. Impaled. The meaning of that word so strange and perfect in that moment.

And not just the fact that there was someone else's body part inside her. Not only that a man's penis had filled her vagina. No, it was inescapably clear, unavoidably obvious, that she was so intimately connected with her own brother. Flesh and blood in ways incomprehensible until that very moment.

"I'm going to move," Aaron said, "I have to."

"Uh. OK," Rachel said. Again, her brain was struggling to keep up with her body. Like when the sound doesn't line up to the picture on the screen.

Aaron drew back, then thrust forward. Again, that burning stretch filled Rachel's pussy. But it didn't hurt so much that time. Aaron started slow, like testing their connection. An almost gentle back and forth despite the frantic urgency of his movements.

"Oh, that's so romantic," Kaylee said. The beautiful cheerleader had shucked her pants and was stroking her golden pussy, deftly.

"It's hot as fuck," Johnny said. Again, he was jerking his thick dick.

"I wish that were me," Taylor said. She too had gone back to openly masturbating.

Amy still had that disdainful sneer on her face, but she was clearly getting herself off. Her thick thighs spread open. Hand jammed into her pants. "Fuck... yeah..."

Noah, too, had his pants off. He was rubbing his long, thin dick up and down, matching the pace of the action in front of him. He was mouthing a word over and over. Rachel quickly realized it was her own name.

Mason was jerking off, too. He hadn't taken his pants off, but his hand was clearly on his dick. His whole body seemed to be humping the desk in time.

Most shocking of all, however, was Mrs. Genesee. The teacher was leaning against the wall. She had one hand clutching her boob. The other was right up her dress. Legs splayed. Not even trying to hide what she was doing.

Aaron saw it too. A weird little smile played on his face.

"I love fucking you, little sister," he said.

"I love it, too," Rachel said, "Big brother."

Every thrust made the pain even less. The pleasure was a bit far away, but Rachel didn't care. Being like this with her sibling -- so intimate and exposed -- felt so good. She never wanted it to end.

"I'm going to do it again," Aaron said, "When we get home tonight. Tomorrow. I don't care who knows. Who sees."

"You'd better," Rachel said. "Don't. Ever. Don't ever stop fucking your baby sister."

Aaron groaned. She felt his penis throb. Rachel's own pussy cinched tighter.

"Faster," Rachel said, "Harder."

"I don't want to hurt you."

"You won't," Rachel said, "Make me feel good. Make me cum. Fuck me. Fuck me big brother. Fuck ME!"

Aaron finally took his sister's words to heart. He drew back and slammed into her with abandon. The desk shrieked as it slid on the floor. Their flash slapped with a thunder clap. Rachel's body finally broke free to glorious, wondrous bliss.

A collective moan rose up from the classroom. Frantic, ecstatic shrieks filled the room. Low, wanting groans echoed through the walls.

Aaron humped at his sister with a wild abandon. His cute butt thrust back and forth as he desperately hammered at her. There was no skill in how he moved. No deft, dexterous motion. He went at her with a crazed energy, a wild enthusiasm, with no thought to how it might feel for his sister.

But that didn't matter one bit to Rachel. Her own body now responded electric to every thrust. A growing, growling surrender to the needs of her body. Again, even in his own inexpert way, Aaron was giving her everything she wanted. The pleasure that filled Rachel now was like a helium pump into a balloon. Only the valve was broken, and the air was coming in way too fast.

"Oh. OH!" Rachel didn't want to make noises, but she did anyway. She fell back. Breasts shaking lewdly with every thrust. Body rolling and roiling as it raced towards her end.

Oh God oh God oh God.

They were the only words her brain seemed capable of forming. Sending them out in a rushed conveyer belt of verbal production for no other reason than that was all it could do.

Aaron thrusted faster. Harder.

OhGodohGodohGod.

Rachel could feel it now. The pulsing in her head. Fingers and toes curling. That frighteningly familiar pressure in her pussy.

Oh GOD! Oh GOD! Oh GOD!

It was coming. Oh fuck. She couldn't fight it now. Aaron plunged into his sister with the mechanical energy of a jackhammer. All Rachel could do was lay back and...

"Cumming!" she cried out. "Oh GOD I'm CUMMING!"

Rachel felt her whole body, her whole universe, collapse down. To a pinpoint. The world went silent. Dark. Distant, she could feel her back arcing. Legs cinching. Pussy clamping. Every joint twisting. Tightening.

Stopped.

One beat. Two.

Then it all raced back in -- an explosion of color. Of heat. Of ECSTASY!

A bursting dam as her mind violently grabbed back hold of reality and forced it right out of her body. "Awwwwuuuuuuugggghhhhhhh!"

Someone was making the stupidest sound. Rachel realized it was her.

A burning pulse shot out of her and Rachel realized she was squirting again. It felt so good. She didn't even care.

Rachel gasped, making that animal cry again, each breath a wonderful jet of bliss. She felt her body coil. To release. But she was somewhere else. So high on her own chemicals she might was well no longer exist. It wasn't stopping. Endless to the point where it was almost frightening.

Rachel fell back to the desk sobbing. Shaking. An almost epileptic tremble as the shockwave of orgasm shook her down to the atoms.

Gradually, finally, the storm settled down to a burbling pool. Rachel felt it go with a satisfaction, but also a sadness. Like meeting God, but only for the splittest of seconds. An incredible pleasure that was so full, so deep, everything in the world would be tinged with gray forever in comparison.

Rachel realized the room had gone quiet. Every breath and heartbeat echoed in her head like a drum. She looked up. Aaron was staring down at her lovingly. The whole class was sitting back, stunned. Hands frozen at their genitalia. Even Mrs. Genesee.

"Wow," the teacher said. All sense of authority gone.

"Damn, girl," Johnny said, "You fucking exploded all over the desk."

"I want," Taylor stopped herself, "No, I need to fuck my brother when it's my turn."

"You guys really love each other," Kaylee said, "That was amazing."

"Seriously, Rachel, you're like some kind of sex goddess," Noah said.

Mason, covered in his own spend, could only stare at the coupling siblings agape.

"That was awesome," Amy said. She even seemed to be smiling.

"Aaron, did you...?" Mrs. Genesee asked. She gestured with her hand.

"Not yet, ma'am," Aaron said. Oddly, it felt like a ma'am moment.

Rachel's brother drew back, then plunged forward. Slowly again. Rachel's pussy felt tingly, raw. Her nerves overstimulated. But she knew her brother needed to... Oh fuck.

The words that had escaped her before came back as heavy and hard as anything she'd felt all day. Post-cum clarity and the pause in the action had finally allowed her brain to piece it all together.

Rachel wasn't on the pill. And her own brother was completely bare in her pussy. About to...

The words were gone again. Fuck. Already, her brother's renewed ardor had overcome any discomfort to send Rachel flying again.

"Uhn. Uhn. Uhn." he punctuated every plunge with a grunt. His cock thickened.

Frantically, Rachel looked to Mrs. Genesee. The teacher was stroking her shaved pussy. She looked over at the siblings and their eyes met. The communication was clear.

Rationally, Rachel imagined that the women in the class were all taking birth control. Because otherwise, how could they even have this class? But Rachel was a year behind. Eighteen years of age was still one short. And now she was completely bare with her own brother.

Rachel felt Aaron's cock swell in her body. Instinctually, she knew what was about to happen.

"Rach- Rachel, I'm close," Aaron said, "Getting close."

Mrs. Genesee held Rachel's gaze. Then the teacher nodded. Once. A sense of despair crashed over Rachel. No help was coming. No release. No escape. Her brother was going to release millions of hunting, hungry sperm into her fertile womb and...

"Aaron wait."

"I've gotta," Aaron said, "I'm going to."

"Aaron, baby, I'm not safe," Rachel said.

"Oh fuck," Aaron said. Whether it was pleasure or worry, Rachel didn't know.

"You can't... If you cum in me..."

"Oh God."

"We'll make a baby," Rachel said.

Aaron's thrust became more erratic. His fists closed around his sister's hips. He wasn't stopping.

"Please Aaron..."

"Cuh-can't stop," Aaron said, "I have to. Gotta squirt. Inside."

"You're going to put your baby in me," Rachel said, "Knock up your little sister."

"I... I know," Aaron said, "Fuck. Sister. Gotta fuck my little sister. Love you so much."

And just like that. Rachel's conviction slipped.

That admission wasn't all of it, of course. Rachel felt her own body building towards another glorious orgasm. Not nearly as strong as before but still. And the thought of stopping, of her pussy being empty and cold, it was more than she could bear. The reality of it was, Rachel knew it wasn't going to end here. If not that day, it was certain to happen sometime in the near future. All that was left was to accept that this was inevitable. And, damn her, enjoy it.

Rachel, do you love your brother? Mrs. Genesee had asked. Back in the other classroom. In another lifetime. And then. Right there. Rachel had known the answer. Yes. YES! YES!

"YEEEEEEEEEEEEEEEESSSSSSSSS!" Rachel screamed, "I love my big brother so MUCH!"

"I can't stop it!" Aaron cried out.

"Please!" Rachel sobbed out. But her pleading was for something very different now. "Please put it all inside me!"

"Yeah? It's OK?"

"Yes!" Rachel said, "I want it so much. Put it all inside. Fill me with your love."

"Oh God. Rachel. Little sissy. Baby sis. I need to do it so bad."

"Cum big brother," Rachel said, "My little pussy. It's all for you. Put your baby in me. You can do it. Fill my womb. Your womb. Make it yours."

"Gonna do it," Aaron said. Almost a chant. "Gonna cum. Cum in my little sister. Oh. OH! FUCK!"

Aaron slammed forward. Froze. His body shook. A low groan escaped his lips. Fingers so tight on Rachel's thigh it hurt. And for a moment, Rachel thought that was it.

Then she felt a searing burst jet right into her womb. Like a lick of incestuous flame. Another. Thicker and fuller than the first.

"Ah AHHHHH!" Rachel's body responded. Ricocheted. A singing chorus as every cell sang in glorious joy. Like she'd achieved some higher purpose.

The feeling that erupted inside her (as her brother, himself, erupted inside her) wasn't joy or bliss or pleasure. It was all those things and more. A sense of complex completeness that wasn't describable in words.

"Oh FUCK! Sis. Cumming. Take my cum. Sister. Taking my cum. So deep inside," Aaron was rambling.

Rachel went right back at him. Not making any more sense. "Yes. In me. Cum in me. Fill my womb. Make it yours. Fuck."

"Luh-love. Love my little sister. Fuck Rachel, I love you so much."

And the siblings stood there, trembling, as they held each other tight. Thrumming and thrusting with a pleasure that only a few have ever known. Their bliss a feedback loop, one driving the other. Pulsing, pounding, almost painful in how it brought their bodies past their normal limits to some other, ethereal place.

Already, a brother's sperm united with a sister's egg. Making their love so real, it would be undeniable.

They both collapsed to the desk. Wrapped around each other. Inescapable.

*

Distantly, a bell rung. Outside, the hallway filled with the sounds of screaming children. Pounding footsteps.

Everything came into focus for Rachel. The room was covered in semen and girl-goo. Stinking of sweat and cum. Teenagers similarly splattered all over the floor. 6 young adults, none of them wearing clothing, simmering in their own juices. Even Mrs. Genesee, her dress scrunched into a single line around her waist, leaned against the wall not saying a word. Her face the picture of sexual satisfaction. The siblings still held each other tight. Connected in body, mind, and soul.

Finally, Mrs. Genesee seemed to take hold of herself. She sat up and clumsily pulled her hair away from her face. "Well," she said. Her voice tremulous. "I have to say that was the best class demonstration yet."

The class all nodded, stupidly, in agreement.

"You've all got quite the example to live up to now," Mrs. Genesee said, "Unless of course, our sibling couple would be willing to commit to a repeat performance?"

Rachel reached up, caressing her brother's cheek. She kissed him, passionately. The siblings turned to their teacher and nodded.

Oh yes, another demonstration was definitely needed now.