Neet Sister Corruption

Jack rushed through the front door having come straight home after school, his twin sister Abbie had gone to hang out with her friends. They had turned 18 the day prior and had spent the evening with their parents and NEET sister Helen. Abbie had a big party planned for the weekend with half the school year attending, she is a petite blonde and very popular, but Jack just wanted to chat with his online buddies.

On his way past he knocked on Helen's door and let her know that he was home, receiving a muffled reply through the door he left her alone. He knew better than to enter her room unannounced. At least she had her doors closed today and her porn wasn't too loud, Jack thought as he entered his room which was next to hers, sharing an en suite bathroom.

He worried about her, she was always a bit weird but had become a shut in since returning from university, having completed a dual master's degree in electrical engineering and computer science. For the last year she had been holed up in her room, pretty much only leaving to eat meals and to hang out with him in his room. Otherwise she just stayed in her room watching porn and masturbating. Everyone in the family had caught her at some point shamelessly playing with her wet, hairy pussy or wandering around the house in various states of undress and had kind of given up trying to change her.

Their parents were happy Helen somehow paid them rent & board so they just accepted her deviant behaviour. Abbie thought Helen was weird but loved her older sister enough to ignore her degeneracy. Jack was the closest to Helen, both massive nerds, and had mostly accepted his sister's lifestyle which he secretly found kind of arousing. He refused to indulge sexual thoughts about his sister but couldn't help getting turned on when he saw her naked or could smell her unwashed pussy or could hear wet sounds and moaning through the wall.

Jack sat at his desk, booted up his PC and tried to ignore the muffled porn sounds coming from his sister's room, as well as his shameful little boner. Opening Discord he was glad to see a couple dozen happy birthday messages from his online friends, as he only had a couple of friends in real life. He chatted and browsed a couple of servers until a message comes through from an account he didn't recognise but could see that they shared mutual servers and friends.

"Heyyy! :) You seem pretty cool, could you explain more about reaction stacking in 5e?", the first message read. Jack explained and introduced himself. She introduced herself as Heather and they chatted for a couple of hours about a bunch of nerdy stuff, he didn't even realise how personal it had become until she called him cute when he told her he was 18 now.

They even exchanged pictures, she was really pretty although she looked a bit like Helen but a bit younger and with slightly more angular features. It made him feel weird looking at someone like his sister when he could hear her in the next room and knowing what she was doing in there, especially because he had been aroused this whole time. His concerns evaporated when she called him cute again and they were forgotten when started talking about Warhammer 40K.

Hearing the front door, Jack politely said goodbye to his new acquaintance and left his room to see who was home. It was his mother, Anna, having just returned from her accounting job. She looked so beautiful as she sat in the dining room and took off the high heels she usually wore. Her slim business attire clung to her generous curves and accentuated her well maintained figure. Her luscious blonde hair hung down to the side, blocking a clear view of him. Her big juicy lips pursed as she struggled with a strap on her heel. Jack moved behind the kitchen counter to hide the little tent in his shorts before speaking up.

"Hey Mum, how was work?" Jack said, trying to sound like he wasn't deeply disturbed that he had just gotten a boner looking at his own mum.

"Long day, Honey," she replied, looking up with bright blue eyes from her struggles, "Could you help me with this strap? These new heels look so cute but I can't get them off."

"O-okay mum" Jack stammered, worried that she would see the little bulge in his crotch, he walked slowly towards then knelt before his mother.

She was fishing through her purse on the table beside her as Jack knelt, not paying him much attention she lifted her foot towards him. Jack tried not to think of this situation as arousing while he gently undid the little buckle on her heels and unwrapped the shoe. His ability to think ended when, as his mother uncrossed her legs to present her other foot to him, he caught a glimpse of her cameltoe under the tight black skirt which had ridden up. Her lacey black panties hugged her fat pussy giving Jack a perfect impression. His mouth fell open and a bit of drool dripped down his chin as he knelt before her dumbfounded. She didn't even look up from her phone as she shook her foot to get Jack back on task. With a shake of his head Jack undid the other shoe but couldn't banish his naughty thoughts.

"Good boy, thanks baby" she cooed, finally looking from her phone down at her smiling son. Not noticing the raging little boner he had, she returned to her phone. Jack stood up quickly and rushed back behind the counter. She rubbed her sore feet for a short while as Jack watched, until he finally regained his senses and poured a glass of water to settle his mind.

He left her scrolling in the dining room and returned to his room as his erection refused to diminish. Deeply ashamed of himself, he refused to touch his almost painful hard on. He sat on his bed for a short while as his head swam with confusing feelings. Was he attracted to his own mother? Did she see his stiffy? Does she know she flashed him? He didn't have any real experience with women and his mum was hot. His mind was racing picturing himself kneeling in front of the gorgeous woman that happened to be his mother. Unable to turn his brain off, he decided to have a shower, hoping to figuratively wash away his dirty thoughts.

Jack turned on the shower before getting undressed in the small bathroom, his small penis leaking precum as it sprung free of his undies. Its reflection looked smaller in the mirror than his own point of view. His appearance was largely unremarkable; shaggy light brown hair, pale skin, hazel eyes, skinny but not muscular physique, not much body hair to speak of, and of slightly below average height. His dick was small, only a bit over 4 inches when fully hard and barely an inch when soft, he even shaved his pubic hair when he read that it would make his dick look bigger. It just made his little dick more visible.

It was the unfortunately perfect moment for Helen to walk into their shared bathroom. Jack jumped and tried to cover himself, an easy task given his size. She stood in the doorway nonchalantly looking at his blushing face and idly rubbing her clit. Jack could see the wetness dripping from her hairy pussy, her thighs drenched. Her hair the same colour as his was long, messy and a bit damp. Her eyes, also hazel like his own, were bloodshot and with dark circles underneath. Her grey t-shirt had wet stains over the front and under the armpits.

Even in his embarrassment, Jack couldn't fail to notice the smell coming from her room, reeking of weed and pussy musk. Jack started to say something but was cut off by his sister.

"Cute dick" she said casually. As Jack tried to think of a response, she continued, "No need to hide it. Not like I give a shit and you should feel comfortable with yourself, especially in your own home."

"You using the toilet?' She asked, as if the situation was normal. Not waiting for a response she pushed her brother out of the way with a wet hand and sat on the toilet, relief visible on her face as she released a heavy stream.

"Seriously bro, don't be so uptight," she huffed when she noticed him frozen in place and covering his crotch.

She reached out and moved his hands to his sides as he stood with a dumb look on his face, the sound of pissing adding to the din of the shower. Never had his sister been so direct, neither had she ever interrupted him in the bathroom. He stared at her, dumbfounded, as she seemed to evaluate his bare penis. The sight of her with head cocked to the side and a slight smile on her face sent a strange wave of pleasure through him, causing him to leak more precum.

"That's it bro, be proud of your body. Your dicky is seriously cute. Not like a proper one, or like a big black cock or anything, below average but super cute. I bet it's super fun to tease and play with!" she said excitedly, "What's got you all worked up?"

Jack's mouth flapped a couple of times before any words were formed. He was overwhelmed by his sister's candid sexuality, the smell of her pussy, and the weird moment he had with their mother. Finally able to break eye-contact he looked down in shame at the answer. There he was greeted with the sight of his leaking, little cock throbbing and bouncing.

Knowing exactly how close he was to the biggest orgasm of his life, it took Jack every ounce of willpower he could muster not to grab hold of his cock. Never had he been so aroused, it was such an effort to resist the temptation that he started perspiring and shaking slightly. He balled his fists and scrunched his eyes closed for another moment. Deciding to answer as honestly as he could he looked again at his sister.

"Mu-m-mum..." he quietly stammered, unable to think of anything else to say as his sister stood and flushed.

"Did you say Mum? How did she cause this?" she asked brightly as she gestured to his leaking dick. Causing his face to burn even hotter and a surge of precum to flow.

"She h-had me take her shoes off a-and..."

"Hot!" she interrupted as her hand went back to her hairy pussy. She rubbed a few circles on her clit before inserting two fingers into her dripping pussy, with her other hand she made a gesture for him to continue

"And then I saw up her skirt." Jack continued, his face burning a brighter shade of red as he tried to look at the floor only to be again confronted with his hard dick leaking on the floor. He could hear Helen playing with her sopping pussy and smell the musk off it. His hips started gently moving on their own as his gaze wandered over Helen's body. Unconsciously humping the air as his desires almost overwhelmed him

"Awwww, that is the cutest, bro! Mummy's pussy has your peenie so hard and leaky!" she gushed excitedly, from both sets of lips, and continued to stare at his dick for another short while.

"But bro, you should really take care of your little problem," she continued empathically, waving her creamy fingers at his crotch, "Let me know if you need a hand."

Jack felt himself get even hotter and another surge of precum leaked, he nearly came right then. His mouth was so dry he couldn't form words. Helen just turned around, started to leave, and over her shoulder added, "I meant like with porn, you cute little perv. Like, what to watch."

As the door closed behind Helen, Jack was left standing in a trance. As steam filled the room, he was able to start thinking a little more clearly without his sister's presence. He got into the shower, his dick refusing to soften. He stubbornly refused to even look at his still leaking dick, refusing to indulge his traitorous, incestuous thoughts. After more than twenty minutes trying to clear his head under the warm water he turned off the shower and dried off.