Chapter 1

Morning came as the light of the sun shined into Lincoln's bedroom. The 11-year-old, however, wasn't able to sleep with eyes still wide open and bloodshot. Lynn was still sleeping naked on the boy's chest and felt comfortable as she listened to his heartbeat.

"Kids! Breakfast is ready!" with that command, the sound of the rest of the Loud Clan burst out and stampeded down the staircase, which was loud, enough wake the 13-year-old up.

"Good morning," Lynn greeted.

She stretched and yawned. Afterwards, she picked Lincoln on the nose, but frowned when she saw Lincoln's exhausted face.

"Are you okay?"

"Y-yeah, I'm just tired. I didn't really get enough sleep from after…well, you know," said Lincoln tiredly. He rubbed his eyes to bring moisture into them.

Arching an eyebrow, Lynn smiled and brushed a hand against her brother's white hair. Then, she said comfortingly, "Hey, it wasn't that bad for our first time. Besides, you were amazing with that big dick of yours." Her face blushed in embarrassment at the end of the sentence.

She moved the sheets away, got up off the bed, and started putting her tank top and now-dry panties back on. She left the room but not before turning back and looking at her brother.

She said passively, Get dress, Linc. You better hurry before Leni, or Lana, start stealing the last batch of pancakes." With that, she left the room, leaving a profound Lincoln behind.

Lincoln sighed. He got up off the bed and sat at the edge with a dispirited expression and his head staring at the floor. "Welcome to the Loud House, where the unpredictable always occurs," he announced, breaking the fourth wall. "When you live in a house with 10 sisters, there's going to be a lot of unbalanced hormones, especially when you're the only boy in the house and are going through puberty…"

"…Talking to yourself again, Lincoln?" the young Loud boy jumped in shock, screaming from the top of his lungs when Lucy appeared out of nowhere.

"Lucy! What have I told you about coming into my room when I'm naked?!" Lincoln questioned irritatingly.

Lincoln's furiousness faded after seeing his sister's face blushed. She smiled, which was a rare sight to see, and stated timidly, "I-it's okay. I don't mind at all." She took a brief glimpse at Lucy's lower area before looking back. This only worried Lincoln even more. "So, I assume you and Lynn have indulge in the forbidden fruit of carnal desires."

Lincoln was bewildered by Lucy's comment. He swallowed the lump that formed in his throat. He trembled and stuttered, "Y-you k-know about w-what Lynn and I-I did?!"

"Don't worry, I won't tell mom and dad. Your secret is safe with me…for a price," she smirked with a sly grin on her face.

The thought of her demand brought shivers down Lincoln's spine as he waited for her requisition.

Lucy ordered in a stoic tone, "I want you to be my audience to test my newly written poems on for a whole week." Lincoln's jaw nearly fell to the floor. He had a hard time stomaching only one of her poems, but listening to more than one, everyday for a whole week.

"I'll see you at the kiddie table, Lincoln."

Then, covered in shadows, she disappeared from the room with a dumbfounded Lincoln to witness her teleportation.

"O…kay, that was weird."

Snapping out of his astonishment, he proceeded to put his clothes back on and walk right out of his room.

Thank god, it's Saturday…

15-minutes-later…

Lincoln was sitting at the kiddie table, between Lana and Lola, enjoying his plate of pancakes and sausages while ignoring the food fight that occurred before him.

"Hey Linc, could you pass the butter?" Lincoln obliged but didn't bother looking at his little sister. This surprised the little tomboy.

She questioned, "Hey! Are you okay!?"

"Yeah, you seem a bit out of it, lately!" Lola pointed out.

"From the look of your eyes and the lack of moisture in your conjunctiva, I can verify that you seem to be deprive of hibernation," Lisa examined impassively.

She received only confused looks from her siblings. She sighed and corrected, "You didn't get much sleep last night," Her tone sounding deadpan.

"T-that's right! I just slept on the wrong of the bed and I'm just tired!" Lincoln lied nervously, yet convincing enough to hide the truth. He quickly got up and brought his empty plate to the sink. However, right when he was heading back, he ran into someone and fell to the ground.

"Oh my god! I'm so sorry, Linky, I didn't like see you there!" Lincoln looked up and saw that it was Leni, looking a bit distressed and worrisome as she looked down at her brother.

Getting up, he groaned and said with an apologetic smile, "It's okay, Leni. It's my fault for not seeing you there."

Just then, Leni gasped with both hands on her face, shouting, "Oh no, Lincoln! I spilled my plate all over your shirt!" Lincoln looked down and noticed the large syrup stain that was now on his fabric.

"Oh, this is nothing, Leni. I can just wash it out in the bath…" he yelped when Leni grabbed him by the arm and dragged him out of the kitchen. "Like, no way, Linky! I caused that stain; I'll help you wash it! It's the least I could do!" with that, they passed the adult table and climbed up the staircase. Unbeknownst to them, Lynn watched and glared as jealousy and suspicion grew inside of her.

In the bathroom, Leni turned the sink on and had it set on hot. Turning around, she saw Lincoln sitting at the edge of the bathtub, commanding with a cheerful smile on her face, "Now, take off your shirt and pants, and I'll have those stains out for you.

"Wait…why do you want me to take my pants off, too?!" Lincoln protested inquisitively.

Hands on her hips, Leni replied impatiently, "Do you want your pants to like remain stained with just a few drops of syrup?!" her cheeks puffed to express her annoyance.

Lincoln palmed his face. He didn't want to deal with this inane problem this early in the morning. So, he stripped until he was in his underwear, but something seemed…different. Normally, he didn't care if his sisters saw him in his underwear. Now, however, he felt a sense of shame wash over him as he shielded his body with his hands from Leni with his cheeks turning red from embarrassment.

Washing his shirt and pants with water and vinegar, Leni turned to Lincoln and was puzzled by his bizarre stance. "Linky, what's wrong? Are you sick, or something?" she asked, placing her head against her brother's. Unaware to the blonde, her cleavage was exposed to Lincoln's vision, exciting him and causing him to feel discomfort in his underwear.

Crap! Why now?! Why from just looking at Leni?! Lincoln made sure to cover his raging boner as fast as he could without his sister noticing.

"Hey, what are you hiding there?! Linky!" too late. Lincoln's eyes widened when Leni crouched down with a smile. Then she elastics of his underwear, much to her brother's protest, "Is it a present?! Let me see!"

Unfortunately, Leni was much stronger than Lincoln and was able to pull his briefs down with ease. However, Leni's expression faded when she saw her brother's big dong, causing her face to flush as her lips quiver.

Lincoln to this as an opportunity to pull his briefs up and make a run for it. Unfortunately, he fell to the ground while his sister's hand grabbed his ankle.

"Lincoln…please, don't go!" Lincoln looked to see a crying Leni. He was even more surprised when his sister started dragging him closer to her until his face was pushed against her large bosom, which made his face turn even redder.

For a few seconds, they just stood in the same position, neither of them making a sound. The only sound was the running water from the sink. Looking up, Lincoln was shocked to see Leni look at him with somber eyes as tears fell across her cheeks. "Lincoln…I know what you and Lynn did last night!"

Lincoln's expression fell with a stammer. "W-what?!" he asked as he played stupid.

"Last night, when everyone was asleep, I went out to use the bathroom and I heard like these strange sound coming from your room!" she explained.

Last night; 12:45AM…

Leni loud woke up with the feeling of an overflowing bladder. Leaning up, she got out of bed and was heading to the door, that is, until she collided with the wall. She searched around her face and discovered the problem. "Oopsie, forgot I had my blindfold on!" after removing the object that prohibited her vision, she quietly strolled out of the room without waking her older sister, and sauntered to the bathroom. Just then, after using the bathroom, she started hearing strange sounds coming from Lincoln's room and decided to investigate. Right when she peeped through the crack, she gasped at what she discovered.

Like what are they doing?! Lincoln and Lynn…together in bed! Her thoughts were plagued by such confusion. The sight of Lincoln and Lynn's naked bodies rubbing against each other, moaning and drenched in their own sweat, was starting to arouse even Leni, herself. Hesitating, she reached her trembling hands down into her panties and stuck two of her fingers into her dripping womanhood. She rubbed them in and out as fast as she could, hoping to climax sooner before she could get caught. As if in a synchronized manner, Leni moaned and felt her legs convulsing as she came, the same for Lincoln and Lynn at the same time.

She looked at her fingers and felt disgusted by hat she had done. Then her heart shattered when she heard Lynn uttered four words, "I love you, Lincoln!"

Tears fell from her face. She sobbed and thought disheartened: "Why…why is it just Lynn and not me!"

Present day…

Lincoln couldn't believe what he was hearing. Meanwhile, while he was listening, he felt something reaching into his briefs and started tugging at his now erected cock. He was taken aback that it was Leni who freed his manhood from its prison and started stroking at it, slowly.

"Leni! W-what are you doing?!"

"I-I'm like making you feel good, Linky!" she answered.

To Lincoln, her hands were so soft against his rod that he didn't want her to stop, but he had to; he had to put an end to it.

"Leni, please! You don't have to do this!"

Leni looked hurt, tears falling from her face as she moved in closer. Then she yelled angrily, "What! You'll do it with Lynn but not with me?! Am…am I not sexy enough?!"

Waving his arms non-threateningly, he corrected, shouting, "N-no! You are…sexy! I'd love to do it with you, but you're my sister! And what Lynn did was…I was tired and…Look, it was just out of passion! Oh!" Lincoln couldn't think straight. Leni's hand motioned faster, jerking harder and harder. Lincoln was breathing heavily; pleasure surged through his nervous system. Suddenly he climaxed with Leni's hand directing the blast to her tits and face.

Leni looked at the glop of cum on her hand and licked it, letting out a euphoric sigh from the salty/sweet taste.

"Leni! Why…why are you doing this?!" Lincoln demanded answers. Leni's grip weakened and he was able to push himself back away from his older sister in a frantic manner.

Leni didn't answer. Instead, she stood up and took off her teal dress, exposing her firm, well-formed breasts to her younger brother, which were big enough to rival either Lori or their mom's.

"Because, out of all the guys I have known, you're the only one who has never turned out to be a jerk," she stated empathically.

Lincoln felt sorry for his sister. He remembered all of the guys she's been with and every guy she's been with were total assholes. They didn't love her for the sweet, compassionate, beautiful girl she was, but for the beautiful, sexy body she possessed. Anyone would be lucky to have a girl as kind as Leni. However, while Lincoln was reminiscing, his face contorted while his 16-year-old sister was down on all fours, sucking his cock, trying to erect it again while taking delight in her brother's cringing looked.

Despite him already ejaculating, Lincoln's recovery was off the charts for after Leni removed her lips from his manhood, leaving behind a teal-colored lipstick stain on the shaft, she smiled as she started getting even more aroused by the sight of it. She picked the boy up and seated him on the toilet.

He wanted to run away, to get away from the inevitable. Unfortunately, after that last convulsion and the lack of sleep, he was unable to move his legs at the moment. He watched as Leni stood up and gingerly removed her panties, bringing them to her brother's face and placed them over his head. "Smell them, Linky, they're like totes soaked with my love juices."

Crouching down, she wrapped her breasts around his member, spitting at it for lubricants and massaged it up and down. She said smugly, "I bet Lynn can't do something like this!"

Lincoln bit his lip, holding in another moan as his hands gripped the sides of the toilet seat. He tried to fight the urge to shoot out another load, trying his best to hold it in. Just then, Leni stopped her pizuri. She stood up and hovered herself over the boy's rod. Grabbing it, she directed it to the right position, or she tried for when she dived in, the member didn't penetrate her womanhood. Instead, it plunged into the other hole. This was Leni's, and Lincoln's, first anal experience…and it felt amazing for the two.

The 16-year-old had no control of her thighs, moving her hips slowly up and down with his dick being consumed by her tight ass.

"Oh god, Lincoln! My ass is on fire with your dick rubbing in it!" she commented pleasurable. Lincoln was the same. He could feel the sense of bliss from Leni's ass juices being produced, combined with her saliva, to create the most pleasurable lube.

He reached his hands and placed them on her hips. He thrusts his hips upward and plunged Leni down, accelerating their movement as they were consumed by the sexual thrill of their debauchery. Looking at her breasts, Lincoln quickly wrapped his mouth onto one of Leni's breasts and started sucking on it, which made her gasped in ecstasy.

"Oh god, Leni! I'm gonna cum!" he exclaimed.

"Go ahead, cum in my asshole! Let me feel your babies in me!" Leni commanded. With one final thrust, Lincoln climaxed, shooting out the last remaining load of hot cum into his sister's ass as she leaned in and locked her lips with his. With each convulse, Lincoln and Leni's tongues tangled even tighter around together in their mouths.

Later that moment, Lincoln and Leni laid in the bathtub, embracing each other in their arms while gazing into their eyes.

"Lincoln, like, that was amazing!" Leni commented flutteringly.

"Yeah…I-I guess it was," Lincoln agreed, although with less enthusiasm as he avoided eye contact.

"And…in a matter of nine months, I get to have your babies!"

"Why's that?"

"Well, you did come inside me. So, like, I'm now pregnant. Though, I'm not like sure how I'll be able to give birth out of my butt, and if the baby will have to eat my…"

Right before Leni finished her sentence, Lincoln stopped his older sister, correcting her informatively, "Leni, you don't get pregnant from the ass! You get pregnant from the vagina!"

However, from that realization, Leni leaped up over Lincoln, shouting while preparing to ride her brother, "Really?! Then there's not a moment to lose!" she plunged her womanhood down onto his manhood, moving her hips up and down while ignoring Lincoln's please, "Leni…Leni!"

Unbeknownst to the two, someone was observing the whole display from afar. Deep in the air ducts, Lynn watched from one of the vents. Hands deep in her shorts and rubbing against the folds of her leaking pussy, tears caressed her face as she mutter sobbingly, "Lincoln…you jerk!"


A/N: Hey, everyone, this is Kman134 with an update on "Loud House: Forbidden Desires". Honestly, the reason I chose Leni as the next girl Lincoln has sex with is mainly because she would've been the obvious because, well, this is the girl who, if dating, who be the most hurt. This is due to the fact that Leni is sexy and naive, yet kind and innocent. So, she would be the victim of jerk-ish advancements from previous boyfriends. Because of that, she would see Lincoln as the only boy who would love her for her personality, not for her body.

Now, the reason for the NTR ending for Lynn was to build up the second chapter. Also, Lucy too has a thing for her brother but isn't open to it until the, possibly, third or fourth chapter where, after forcing Lincoln to listen to her poems, she'll confess her love but won't be able to have sex out of the fact she's only 8-years-old and would be extremely painful for her. Lastly, Lincoln will not have an oedipal moment with Rita because that would be going too far. However, I will show a glimpse of Lynn Jr and Rita's sex life, which will be a little weird.