A/N: Hello everyone! This is the first story I have ever posted on this website. Yay! Hopefully, my writing meets any standards you may have going in. I've written for multiple cartoons in the past, and right now, the Loud House has been the show that has sparked my creative side, particularly the Sin Kids AU.

The Sin Kids AU has hooked my interest over the past few weeks, mostly thanks to the fanart I've seen. If there is one type of story, though, that I wish existed, it's a deconstructionist fic that calls out the inherent issues with incest and what it can do to familial relationships. I'm sorry, but as someone whose religious, I just can't bring myself to support and cheer for incestuous relationships. Yes, I realize that may be a contradicting statement, considering I've been seeking out good fan works for this universe, but the story potential, character interpretations, and artistry are just too good to pass up. Besides, the kids, themselves, aren't the ones that did anything wrong. That would fall on Lincoln and his sisters.

It was with all of those thoughts that led to this story being made. A story where Lincoln's reasons for sleeping with his sisters aren't tied to romantic love, but a broken psyche caused from his sisters' bad decision-making.

Most of that comes later, though. For now, enjoy the first chapter. Hope you like it. Thanks for giving it a try, at least.

Warning: while not too detailed, rape of a minor lies ahead. Read at your own risk.

Disclaimer: I do not own anything from the Loud House. I only own the idea for the story.

Alcohol is one hell of a substance. One minute, you feel perfectly fine, and for some people, better than before. Next thing you know, however, you're stumbling anywhere and everywhere, you have no idea what it means to see straight. It also makes you do and say things that were better left to the mind. Alcohol is both a truth-telling serum and a very aggressive wingman, constantly goading you to do things that shouldn't be done, putting your own satisfaction ahead of any and everyone else. Depending on someone's tolerance, one can either be smart enough to fight it or just give in completely to whatever desires you feel.

For the Loud family, they were in the latter category. One big rule Rita and Lynn Sr put themselves on was to keep the house as dry as they possibly could, so as to keep their kids on the straight and narrow and not tempt them in any way. They were fairly certain their kids had about as good a tolerance as they did, and they were the adults. Yes, both parents had extremely weak tolerances when it came to alcohol. It didn't take a whole lot to get them drunk, and once they were, steer clear of any bedroom, bathroom stall, or unlocked backseat when both of them were in the same building. Seven, count 'em, SEVEN of their kids were the products of drunken sexcapades the two partook in, all of whom were Leni, Luna, Luan, Lincoln, the twins, and Lisa.

The kids were lucky their parents hadn't put themselves in truly dangerous situations because of drinking. Neither of the two parents ever drove drunk and they never had a case of waking up nude in a back alley somewhere covered in bruises. The worst they ever suffered was waking up in the back of Vanzilla, naked, and a flashlight being shown in by a police officer, citing them for indecent exposure. It was that incident that convinced them they should limit their drinking to when they were home and the kids wouldn't see it, so after the kids went to bed.

That rule had loopholes in it, however, and one was that it never applied to the kids when they brought their own drinks home. They never enforced a dry rule on their children, hoping that strong parenting and talks about alcohol would stave off any bad decision making by them. They could not have been more wrong about that, proven when Lori had her first drink. She had come home from college to celebrate her 21st birthday with her family and wanted to celebrate with drinking beer with her parents.

They had several, and the two parents celebrated with yet another run to the bedroom (though they could keep calm about having another child since Rita had a tubal ligation done and Lynn got a vasectomy done after Lily's birth to prevent future pregnancies. Eleven was as far as those two were willing to go). Lori, meanwhile, had the fun of getting drunk for the first time as a Loud. Her vision was horribly impaired, she didn't know what it meant to stand up straight. She was also feeling really hot and bothered. There was a sudden need for her to just run towards the nearest man and take all of her clothes off, letting him do whatever he wanted to her. If she were at college, she would've just ran straight to Bobby and let him do his thing, that wasn't who she wanted right now. In her drunken state, she carried her desires to an extremely dangerous territory, her very drunken mind prioritizing her own lust over social taboos and the law. She wasn't lusting after her boyfriend, Bobby. She was lusting after her own fifteen-year-old brother, Lincoln.

It made absolutely no sense. Lori was always satisfied when she and Bobby did it, and she was never the type to want sex on a frequent basis. She always put focus on her goals, working hard studying and being active in the clubs she was a part of on campus. Heck, she even found a new passion in persuing a business management degree, actually enjoying the classes she was taking for it and scoring highly on every test she took. Everything was going good for her. She had no reason to go after Lincoln...or at least, not when she was sober.

See, subconsciously, Lori had always had a really small and hidden affection for him, one that wasn't an affection that an older sister would normally have for their brother. She had plenty of affection in him being her little brother, and it was the only affection that showed when she was alert and conscious. However, deep down, there was a sense of desire for her to make sure Lincoln was being treated right. Her bonding with him made her care much more about him and wanted to make sure he was happy. If anything bad happened to him, she would be out for blood. Whenever she went to Bobby's, she would stink-eye Ronnie Anne if she thought the girl was planning to prank Lincoln.

Her appreciation for him had developed into something more than simple affection for her younger sibling. She had officially developed a brother complex.

She began worrying a lot more when she wasn't around him. Would he go where he wasn't supposed to? Would he get shot? What about stabbed? Maybe someone would try to drown him in a fountain and she wouldn't be around to help him. She recognized that these thoughts were not like how she used to think about her brother and locked herself into the bathroom to have a silent chat with herself. She looked at herself in the mirror and started to remind herself that Lincoln was a good kid who wouldn't take the dangerous routes. He cared about his sisters and they cared about him. It would be silly to think that he couldn't make the right decisions if she, or any other sister, weren't around to protect him from all the dangers of the outside world. This made her think to herself 'Look at me. I'm literally becoming mom.'

She knew she couldn't protect him from everything the world had to offer, but she could at least start with herself. She made it a point to never try to hurt Lincoln in any way, but instead be the person he could run to if he ever needed someone to comfort him. She wasn't always the most approachable person with how authoritive she could be before she turned 18.

In the present, though, she was drunk, far too much so to remember her promise to not hurt him. Instead, she felt like she should make it up to Lincoln for all those years of hurting him. One thing Lincoln was always good at that his sisters weren't was his willingness to correct any and all mistakes he ever made. His sisters could be touch and go about righting their wrongs, but when it came to Lincoln, it was all but fully guaranteed. Two instances, in particular for her, fueled this thought. The first was the time where he covered for her at her job after he abused her kindness. He skipped out on a party he wanted to go to so she could go to the dance that was the very reason she got the job to begin with. She also remembered when he stole Bobby away from her, always acting like bros while she was just the third wheel. Seeing her upset made him give Bobby back so she could be with the love of her life again. She saw him as the best of them in her current state, and she wanted to make it up to him for every time she didn't try to fix things with him. What better way to do that than to give herself up entirely to him?

She found Lincoln passed out in his room, apparently a side-effect of one of Lisa's experiments he agreed to test for her. Lisa gave him an ointment that was supposed to extend how long the human body could go without water for several weeks. A side-effect was that it knocked you out into a deep sleep while it analyzed the subject's personal body and activate accordingly so the person could function like they normally do.

Lori tried to wake him up, but it was of no use. While she couldn't pleasure him while he was awake, at least his unconscious body could still enjoy it. She proceeded to say "You wouldn't mind, right Lincoln? This is what you deserve, after all" in a very slurred manner, took her clothes off, and went about doing whatever she thought he would like on top of him.

She thought they would both enjoy it. He gets to feel amazing and she gets to feel good about making things up to her brother. So why was she crying, then? Rather than revel in the feeling, she was acting like she was desperate, but not for sex. She wanted forgiveness. Alcohol, as stated earlier, is a truth telling serum, giving the people who drink enough to suppress any sort of negative emotion the chance to actually speak what was on their mind. In her past, she thought she was horrible to him, one of the worst sisters ever, constantly threatening him with physical violence, always trying to control him in very strict ways, taking advantage of him. To the outside eye, however, that didn't seem too bad if you got the whole picture. They both were selfish and tried to get the other to do things for their own gain. That's just regular sibling dynamics, really, and besides, they weren't situations that could be categorized as dangerous, and they still cared immensely for one another. Yet alcohol was also a wingman, and a very bad one at that. It could make someone really overthink things if they didn't have their emotions fully in check. This was the chance for a person's inner demons to take hold and drive them to do something most sober people would never do. She truly believed she had failed him in the past…and she thought that this was the best way to make it up to him.

She started putting more effort into what she was doing. At first, it was slow and steady, doing what she thought he would like the most. In drunken desperation, however, she started ramping up her efforts, going faster and trying to push him deeper in. This increased effort started to get the better of her, and she started to moan, absentmindedly forgetting that all of their sisters were home that night.

The first sister to take notice was Lucy, the moaning making her think there was a ghost in the house. Score! She quickly closed her poetry book and headed out of her and Lynn's room to follow the sound to its source. She thought this was going to be great, validation for all her hard work at trying to contact the spirits for so long and finally getting a response in the physical world. What would she ask? What was the ghost like? Did they know great grandma Harriet? Oh, the stories that the spirit could regale her. She was so excited.

…That is until she made it to the source of the noise. It was coming from her brother's room. Was the ghost actually there for him? Being the ghost-lover that she was, she had to peak her head into his room to find out. Once she saw what was actually making that noise, she never felt such a rush of fear flow through her in her life. Her legs had no feeling whatsoever, her voice was gone, and she felt like she was going to start violently throwing up.

Despite being a year shy of a teenager, she was still around the age when puberty started for girls, which meant the talks about everything sex-related started for her. The usual beginner's talks of conflicting emotions, bodily changes, and things of that nature were starting to be discussed with her by her mom, or some of her sisters if they thought they could help her. That said, even she knew what it meant to give consent, and she didn't see any sign of Lincoln's body consciously moving along with Lori's, not helped by seeing his head lifelessly bobbing around. Poor Lucy was just starting out with puberty, and here she was witnessing two of the most reviled types of sexual encounters. This was incest, and to make it worse, rape.

None of the other girls had noticed this noise, yet, having been too caught up in activities in their own rooms to care too much, or in the case of Lynn and the twins, having fun outside. Lucy knew her parents were drunk which usually led to them falling asleep earlier and being really hard to wake up until the next morning. Besides, they were on the floor below anyway, so too much time would pass getting them. She had a range of sisters to call on, but she didn't know which one, so to get their attention, she simply started banging on the walls in the hallway. Part of this was to get her sisters' attention, but also try to let some aggression out of her system. She would've wanted to be the one to help Lincoln, but her size compared to Lori would've made it impossible to fight her off. She wanted to help, yet all she could do was watch as her brother got abused.

Both Luna and Luan heard the banging and walked out of their room to see Lucy slapping and punching the wall, noticing tears falling down her face.

"Hey Lucy, you okay?" The two older sisters were quick to run over to her and Luan tried to calm her down.

"Lincoln…" she responded. "He needs our help!" She said this with as much emotion as she could while practically dragging her two older sisters to Lincoln's room. Now, they could clearly hear the moaning, which they thought was coming from Lucy doing any number of occult activities she often did. The moans clued them in on what was happening, and in the span of less than a second, Luna put two and two together, her big sister mode kicked in, and she sprinted right into Lincoln's room just as Lori had reached climax, Lincoln's body having done so before the sisters entered the room.

Witnessing the sight, Luna had enough adrenaline running through her body to probably rip the teeth out of a great white shark. She practically suplexed Lori off of Lincoln and delivered a series of harsh punches right to her face when she was on the ground. Luan, meanwhle, made a beeline for Lincoln, noticing his naked body and a complete lack of consciousness from her younger brother. Tears began filling her eyes as she realized the situation, and she cupped her mouth and fell to her knees in agony over not figuring this out sooner. She started to get angry with herself, wishing she took the moaning seriously. Maybe she could've gotten Lori off in time. Maybe this never would've happened to begin with if the her and Luna had just left their door open. Any number of things could've stopped this, but it broke Luan that none of those things ever came to fruition. This was all too real, and she felt sick to her stomach.

She turned her head to see the fight between Lori and Luna getting more even, the punches to her face sobering Lori up enough to try and fight back. Luan couldn't help but run over and, with a feeling of rage inside of her that was very uncommon, kneed Lori right in the abdomen before delivering one more punch to her face. This seemed to be enough to keep Lori down for the count.

Rage was still plastered all over the faces of Luna and Luan, but they were in control enough to not throw anymore physical attacks at her, Lucy shivering in fear just beyond the door. Instead, they venomously asked one question.

"What...the heck...is wrong with you?" Luna couldn't have made an angrier whisper if she tried.

Lori seemed fully aware of everything now and looked to see that her clothes were on the ground, her brother was laying naked and unconscious in his bed, and that while her face and stomach were aching, her legs felt slightly numb. The realization hit her harder than a freight train running at full speed. She practically did the same thing Luan did earlier in cupping her mouth and crying hard. She all but forgot that there were three upset (to put it mildly) sisters in the same small room as she curled up into the fetal position and balled her eyes out, feeling nothing but self-loathing throughout her entire being.

As much as her sisters wanted to hurl every sort of inappropriate insult and physical attack her way, they held back, noticing that Lori had finally come to realize what she was doing, though that did nothing to make them feel any sort of pity for the girl. As such, Luna harshly grabbed Lori's shoulders and, with Lucy following her, took Lori into the bathroom while Luan stayed behind to watch over Lincoln. She wasn't sure if he was going to wake up at any point before morning, but she'll be damned if her brother was vulnerable to anyone else tonight.

She looked down at his peaceful form and helped put his clothes back on. Of all the people on earth, Lincoln was not someone who deserved to have this happen to him. Lord knows what he would do if he ever found out.

A/N: The event that starts everything off is now in the books!

I'm actually surprised by this fandom's lack of fanfiction centering around the concept of the sisters having a brother complex. That just seems like such an obvious idea for a story, where the sisters act very protective of him because of all the times he has helped him out. Oh well. That just means more stuff to be written in the future, then.

Hope you enjoyed. If you did, hope to see you next chapter (which may take a couple weeks because yay finals week). If you didn't, thanks for giving it a try anyway.

Hope everyone has a wonderful day!