The Book of Lilith - Cover

The Book of Lilith

Copyright© 2025 by Igor Blackfire

Chapter 3: Defloration

Incest Sex Story: Chapter 3: Defloration - Lilith Ripinski is a 15-year-old loner, with an annoying 17-year-old brother named Samuel. One day, he pushes her just a little bit too far, and they enter into an intense, surreptitious sexual relationship. "The Book of Lilith" chronicles the development of their incestuous dynamic, their struggle to keep it secret, and the way Lilith's confidence grows as a result of feeling desired for the first time.

Caution: This Incest Sex Story contains strong sexual content, including mt/ft   mt   ft   Teenagers   Consensual   Reluctant   Heterosexual   True Story   School   Incest   Brother   Sister   DomSub   Rough   First   Facial   Masturbation   Oral Sex   Spitting   Public Sex   Small Breasts   Slow  

Hiking. Restaurants. Shopping trips. If given a choice, Lilith would opt out of all those activities, but of course no choice was given. If her stepmom and half-sis were to be believed, these things were stimulating to the human spirit, but the reality was just a whole family huffing and puffing and getting progressively more upset at each other over the course of a day.

Lilith herself usually shambled at the tail end of the group; she found perverse satisfaction in quietly observing the escalating annoyance between the different members of the Ripinski family, and her own mood was already too gloomy by default to be brought down further by any of them.

Except maybe Sam ... but, aside from constantly pulling her hair, Sam had been downright nice today, which was more unsettling than any actual bullying he could’ve undertaken. When they finally made their way back to the cabin after another pointless, gruelling adventure, he pulled her along.

“So, Allie told me about this big campfire every night, where kids from the campground go to drink and smoke and stuff,” he informed her.

“Yeah. Have fun with that, dumbass,” she mumbled. Socializing was a nightmare—and other people’s insistence that she engage in it constituted the bane of her existence. He couldn’t make her.

“So anyway, I was thinking ... look,” he continued as if he hadn’t heard her. From the corner of her eyes, she watched him ruffle in his bag and produce those two bottles of liquor he’d bought on Friday, the ones with suspiciously bright and soda-esque looking contents.

He handed her the blue one, keeping the pink for himself. “ ... I think tonight’s your night, sis.”

The bottle felt heavy in her hands. “ ... Tonight?” she asked.

He pulled on her hair, playfully. She swatted the bottle at him, which he wisely dodged. A second later he was on top of her again. “Yeah, tonight, Lilly,” he told her. “I wanna see you drunk. I guarantee you’ll have fun. You just need to loosen up a little.”

Lilith bit her lip. It was very embarrassing that she was suddenly more inclined to agree just because he’d pinned her. “Maybe,” she allowed.

Maybe he was right. Maybe tonight was her night to shoot her shot, vis-à-vis her virginity etc.; she’d already crafted some one-liners pre-emptively just in case he’d object to things. “Yeah sure, it’s illegal. Big deal. So is smoking weed, buddy.”


Gravel crunched under Lilith’s worn-out combat boots as she bounded down the hill, off the campground, towards the creek. In the twilight she could already make out the fire in the distance; momentarily, she imagined herself walking straight to hell.

She scowled, clutching her blue-colored booze like a lifeline. Like all the liquor Lilith had ever tasted, it had roughly the flavor of cleaning detergent, in spite of the deceptively cute coconuts on the label ... but Sam had bought it for her, and so she drank bravely.

The bottle was already a quarter empty just from sipping in the tent. She’d hoped that it would calm the blaring anxiety around peers and parties that normally prevented her from doing this sort of thing.

At the edge of the treeline, Lilith came to a sudden halt as she registered the fact that it was dozens of people down there. Multiple dozens. Pop music blasted over tinny Bluetooth speakers, and she was put in mind of an outdoor high school cafeteria with a big fire in the middle. Hell indeed.

She fiddled anxiously with the belt loops of her shorts. Shorts! What on earth had she been thinking? She didn’t have the butt to pull off this kind of outfit ... She’d tried hard to look nice tonight, her hair done up in two little buns, but she felt so naked without a big sweater or something to cover her arms—

A hug enveloped her. “Lilith? Hey! What are you doing here? And why are you wearing my shorts? Whoa, what is that? Booze with Gatorade? Wait ... are we finally hanging out? Oh my gosh! Yess!!”

Lilith winced at her whirlwind half-sister, whose sheer enjoyment of life always seemed a little unwarranted. “ ... I wanted to wear something cute, I guess,” she answered belatedly. “Silly me, I guess! I look so dumb.”

“Are you kidding? This looks friggin’ great on you! You can honestly keep ‘em if you want! Your have long legs and stuff! And I never wear those anyways!” Then why did you pack them, Lilith wanted to ask, but before she could articulate herself, Allie was already pulling her towards the crowd. “C’mon! I’ll find us a nice spot by the fire ... Also, can I have a sip of that too, pretty please?”


Lilith probably should’ve seen it coming, but this whole campfire situation was clearly segregated by age. The older, cooler kids were in charge of the fire, the music and the general vibe of the situation. Since Lilith and her sister were neither old, nor cool, they ended up parked off in the periphery among the other little siblings.

Apparently her sister already knew half of ‘em by name. Lilith stammered her way through various introductions, then quickly settled into the role of observer. It helped that Allie did three people’s worth of talking.

Meanwhile, Samuel was all the way over there—she could see him, but there were walls of sound and people between them. Maybe it was ‘cause of his facial hair, which made him look a bit older, but he mingled comfortably with people two, three years his senior ... and unfortunately, really comfortably with one redheaded girl in particular.

For the next two hours, Lilith just sat there scowling quietly, all jealousy and repressed rage, while taking recalcitrant gulps from her unholy blue concoction as if that would make things better, watching this bitch flirt with her brother.

The blue stuff did, in fact, make things a little better. The constant self-doubt in the back of her mind was muted. She found herself actually talking to her sister and these other kids, dropping a few quips that got a laugh out of all of them.

Regardless, Allie’s little friends left one by one as the hours passed, driven away by Lilith’s dark aura no doubt.

She held up her bottle, a little under half full now. The blue hue was weirdly pretty, illuminated by the campfire. It was probably a bunch of disgusting chemicals that made it that way.

Unfortunately, no matter how euphoric the booze was making her inside, her front-row view of what her brother was up to across the fire still got her sad and mad. Now Sammy leaned in to whisper something in Fat Red’s ear, and the girl blushed shyly in response. It was disgusting, and yet, Lilith couldn’t look away from it either. She took in every smirk, every giggle, every little flutter of Fat Red’s eyelids, and how she brushed Sam’s shoulders, his hands...

She wanted to vomit.


As the night wore on, Lilith and her sister got to claim seats closer and closer to the fire, but that did nothing to improve her experience. It seemed that the more people left, the more of Fat Red got draped in her brother’s lap. He even started playing with the girl’s hair, as some kind of dark parody of when he’d played with hers.

Lilith chuckled darkly. And maybe it was the fact that she was close to piss-drunk, but she could swear he sent an evil little smirk her way, too. As if to say, look, Lilly, I don’t give a shit about you, you dumb, skinny little freak.

Lilith’s grip on the bottle had become white-knuckled, so it took Allie a moment to pry her fingers off before she could take another sip. Then she followed her locked-on gaze, and rolled her eyes. “Gosh, Lills, what is your problem? You’re acting like he’s, like, your boyfriend or something! Hello! He’s your brother!”

“I know,” Lilith snapped.

“ ... Here, you can have the rest.” Allie handed the bottle back, and stood up. “I gotta pee. Do you need anything from the tent?”

Lilith hardly acknowledged her. Across from them, Samuel and Fat Red had escalated to full-on making out, sloppy style, and though she’d been staring all night, Lilith quickly lost the stomach for it.

God, she had to get the hell out of here.

Glancing down at the bottle in her hands, she was startled to discover it almost empty. Then again, her head was utterly spinning. Hey, where the hell did her sister run off to, anyway?

Lilith was dizzy on her feet. She stomped in the general direction of the cabins ... but that meant passing right by Sammy and Fat Red, and then she found herself come to a stop in front of them, fists balled at her sides.

In this state, she just couldn’t quite help herself.

“Hey!” she said shrilly. Bent forward, she made eye contact with Sam. “I’m sorry, I can see you’re ... busy, umm, making out. Nice to meet you ma’am by the way, I’m Lilith. Anyways, Sammy, can you please come with me real quick? I ... need your help with something. Sorry!” She did her best to sound genuine.

Sam sat up, but slowly. “ ... Are you actually serious right now, Lilly?”

“No, yeah, like, a thing, umm, just came up. It’s really important. It’s ... really bad. Annette is involved.” She had no idea what she was saying. That wasn’t the point. It was more about the general idea, anyway. She hoped he wouldn’t pry for specifics.

Sam sighed, ran a hand across his face, and locked eyes with the interloping redhead girl who seemed a bit confused. Lilith had no sympathy for her. “ ... Sorry, babe,” he groaned. “My sister, she’s like, a bit retarded.” He made a loopy gesture with his fingers. “Don’t worry, I’ll be back in five minutes, tops.”

Lilith stomped off, not looking back, ‘cause she knew Sam would follow. She hoped so, at least. She tried to sway her hips more than usual.


It hadn’t always been war between Lilith and Samuel. In fact, he only took up the mantle of World’s Biggest Douche around three years ago, when he went to high school without her.

Up ‘till then, they had been very close, and often mistaken for twins; Sam’s growth spurt put an end to that. And it wasn’t just the growth spurt. He started smoking weed, and going to parties, and hanging out late with his new friend Faye almost every night doing god-knows-what, and he decided Lilith was his “little sister” all of a sudden, where she’d always just been his “sister”.

“You’ll get it when you go to high school, Lilly,” he’d told her. “Nobody hangs out with their middle school siblings. But once you’re here too, maybe we’ll go to the same parties.”

Alas, we all know how that turned out. Unfortunately, unlike her kinda handsome brother, Lilith hadn’t made lifelong friends in the first week of freshman year, only various lifelong enemies.


As Lilith led him away from the campfire, she took the path further into the forest, not back in the direction of the cabins, but he didn’t call it out.

Instead he made fun of her. “Thanks for the cockblock, freak. Also, ‘ummm it’s really bad’? You made it sound like you pissed yourself or something, for fuck’s sake.”

Lilith ignored him. Her cheeks were already burning from the alcohol, so he could hardly make her blush.

And also, the booze got her confident. She twirled around with her arms outstretched, and promptly tripped over her own feet. Sam caught her. “ ... You’re completely shitfaced, aren’t you?” he asked, breaking into a grin.

She remembered how she was supposed to be mad at him, and wiped the matching grin off her face, pushing him away with a huff. “Maybe. It’s whatever.”

“Damn,” he went, shaking his head. “If I’d known you’d be drinking that whole bottle, I’d’ve wanted to be there for it.”

“Well, too bad! Apparently you wanted something else more! Or should I say someone! So I hope it was fun ... I bet you were only doing it to make me jealous.”

She bit her lip. Her cheeks warmed further; she really hadn’t meant to say that last part out loud.

Sam rolled his eyes. “Not everything in the world revolves around you, Lilly. Maybe I’m just really into redheads.” Yikes. Lilith couldn’t help but think of Faye, the other redhead between them.

“Fine!” she snapped. She threw her arms up in frustration. “I can’t even with you! Fine! Go back to Fat Red and fuck her silly for all I care!”

He raised an eyebrow. “Her name is Zoe.”

“Right. Like I care.” She kicked a pinecone away, hard. “So have fun with Zoe! That fat redhead bitch! I guess you don’t want old Lilly anymore, huh!” The alcohol was definitely empowering her hysterics, but it felt so good to yell at him for once.

A beat of silence passed between them. It was like she could still hear the deafening echo of her own yelling.

Then, a disbelieving grin spread on Samuel’s face, and he rolled his eyes. “That’s what you think?”

He grabbed her by the hair, bunching the locks around his hand and holding her head like that. Lilith shivered at the weird, possessive gesture of it. He brought his face closer. “Silly Lilly ... you don’t need to be possessive. Don’t worry. You’re always gonna be my favorite little nutcase.”

His breath smelled like beer and he was breathing a little heavier than usual, but she wasn’t in any position to judge.

She stared up at him defiantly for a second or two, before averting her eyes. “Mm ... I might need some reminding, y’know, every now and again, because I’m a mess. Alright? I’m sorry. That’s what it is.”

“I see ... I get it,” he drawled. “All this drama, and it’s just ‘cause you’re a horny drunk.”

Before Lilith could object to that qualifier, he shoved her against a tree, and all she let out was embarrassing little sound. Sam wasted no time slipping his hands under her shirt.

She puffed out her chest for him, and was rewarded with a thumb flicking over her nipple. “Nn. Oh. That’s nice,” she sighed. Then she frowned. “But you’re still an asshole, though.”

“Sending mixed messages there, sis.”

“What can I say. I’m very complex.” She was churning out corny one-liners tonight, or so it felt ... Well, it wasn’t her fault that words just kept tumbling out of her mouth for some reason.

“That’s one word for it.”

“Well, what word would you use then?” she asked impishly.

“Creepy. Weird. Retarded.” He counted them on his fingers as he rattled them off, while his other hand still squeezed her tit, playing with her nipple. “Nymphomaniac, too, I think.”

“Yeah, okay, I get it.”

“Do you, though?” Sam stepped closer, pressing her in-between him and the tree. He was almost a head taller than her. She shivered. “This thing you want from me ... it’s messed up, you know that, right?” he whispered, his breath warm on her ear.

Lilith didn’t respond right away. Her head was spinning, drunk as she was on booze and her brother both. She let out a moan. It couldn’t be helped; he was standing so close that she could smell him.

“Yeah, w-well, then you’re messed up too, aren’t you?” she managed eventually, wriggling her chest away from his groping hands.

“Oh, I definitely am. It’s messed up how much I want you ... Not normal. Fuck.” He sighed.

“You want me?”

“Like you’re just learning that now.” He chuckled, then pulled her hair again, tilting her head and baring her neck. “You little slut.” He brought his lips down.

“Nnh. Sam,” she whimpered, wrapping her arms and one leg around him, kissing his cheek and his jaw in horny desperation, no subtlety or shame left. She just wanted him to take her, have her. All of her. She wanted to feel whatever he wanted her to feel—especially if she’d regret it later. “Please, just ... just ... give it to me. Please.”

And Samuel could read it on her face. “God...” he whispered. “You’ll really just let me do anything, huh?”


Ten minutes later, she was on her back in the grass, shorts discarded, panties pulled to the side with her brother’s face buried in her cunt. She gasped when he took hold of her ankles and threw her legs over his shoulders while licking and kissing up the inside of her thigh.

She was already embarrassingly wet, but she blamed the booze; and she had no time to be ashamed of anything, as Samuel proved relentless. He didn’t just tongue-fuck her or suck at her clit, he licked her asshole too, and everything in between.

The angle was awkward; the tree’s bark was rough where it chafed her. It was the hottest moment of her life. Lilith had her fists clenched, while staring wide-eyed up at the stars. “How, mmmh, how are you so good at this shit?” she half-giggled, half-whimpered, letting her head loll back against the tree.

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