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Becky's long blonde hair covered her upper back, which seemed to just accentuate how curvy and perfect her rear was. It was needless to say the perfection of this sight crushed any remaining willpower Liam thought he had. All he could think about was how badly he wanted to stick his dick in her right then and there.
Liam's dream slowly slipped away and he started to stir. The first thing he noticed was just how hard his morning wood was. Instinctively he pressed his hips downwards and smushed it into the softness of the mattress. Fucking hell... he thought to himself as Liam's thoughts instantly became clouded with horny imagery. Liam's morning wood was always harder than normal, but on this occasion there was a good reason why he was so bricked up. He opened one eye and glanced at the calendar on his wall as he started coming around. Friday 29th November...we're getting closer...

Liam was prolific gooner, a porn addict and frequent masturbator...until recently. Liam knew what he was doing wasn't healthy for a 20 year old, and as such he decided to attempt No Nut November for the first time. The first two weeks were very difficult for Liam. No porn and no pleasure initially made him feel extremely grumpy, and he would frequently snap at his parents Tom and Sarah, as well as his step-sister Becky. However, once Liam made it past this initial slump, he began to notice that he felt more positive and mentally healthier. His eye seemed to become more tuned into and appreciative of the beauty around him every day. In work Liam used to stare at his co-worker, Sabrina, in a overtly sexualised manner. There wasn't much in the way of attractive women around his age at work, and Sabrina was the best of a bad bunch. Her curvaceous chest and hips made up for her admittedly plainer face. Liam would mentally picture the ways in which he would direct her in a porno, turn around, let me see that ass... he imagined saying to her, unimpressed by her face. However, since passing the first two weeks of No Nut November, Liam noticed his perspective had shifted and he found himself appreciating Sabrina's personality and the cuteness of her imperfections more. An attraction was developing beyond pure sexualisation, and that's how Liam knew this challenge was helping him a lot.

However, problems began to resurface last week. After three weeks of no masturbation and no release, Liam's horniness had started to tick up once more, and he noticed he was getting random erections far more frequently. Each day that passed made him feel hornier and hornier and his morning wood was getting harder and harder. Liam's mind was becoming swamped with urges again on his way to work, and during working hours. It became increasingly difficult for Liam to take his eyes away from those curves he so craved in women that passed him in the street. Sex was on his mind and his backed up balls felt like they were taking over his mind. Liam would take breaks, breathe through it and refocus his mind where possible. This worked well as a coping strategy at first, but as the days passed by it was becoming less effective.

This morning, Liam tried to ignore the mother of all stiffies in his pants, and dragged himself out of bed to go downstairs for breakfast. For a few moments his cock had retreated, as Liam distracted himself by eating his Cheerios. However, a few minutes later Liam caught himself staring at a particularly shapely peach in the table top fruit bowl, which provoked him to daydream about ass cheeks, instantly causing his erection to return.

This is ridiculous!! How is a plump peach getting me har- Liam's morning-horn filled thoughts were suddenly interrupted by his step-sister's soft voice.

"Hey" Becky muttered quietly without any enthusiasm as she came into view to Liam's left, walking straight over to the fridge in her rather skimpy pajama shorts. Becky was 6 years older than Liam, and was a typically bratty older step-sister. Unfortunately for Liam, Becky's personality and body type was Liam's exact weakness. Liam liked older women, blonde hair, ridiculously curvy asses, thicc thighs and hips, a well-endowed jiggly chest, and an arrogant dismissive attitude. Becky had all of those things and then some. Liam kept any sexual thoughts about Becky in check by focusing on how annoying she could be sometimes, and squabbled with her routinely as most step-siblings did. But Liam also kept his urges in check by regularly watching porn and jerking off, and clearing any sexual thoughts about her in that way. Yes, sometimes the porn Liam watched was step-sis and step-bro themed...but that's just a coincidence... he justified to himself. I'm not watching it BECAUSE it's a hot step-sister video...it's just that all the best pornstars with the thiccest asses are doing these videos a lot these days! The narratives that Liam spun in his own mind were neither here nor there. The reality was that Liam was no longer able to control his urges by jerking off, and as a result he found his eyes wandering to Becky's thicc ass as she stood there collecting something from the fridge. Liam's eyes were fixated on that delicious rump of hers. Even the slightest movement of her upper body caused a jiggle effect on her ass cheeks. Liam was momentarily hypnotised by Becky's ass, and felt his boner throb in his pants and push against his underwear like it was begging to be freed. However, it quickly dawned on him that he had ignored Becky's greeting, and Becky had noticed too. She slowly turned her head towards Liam with a raised eyebrow. Liam just about looked up in time to meet her eye contact and prevent her from noticing that he was in fact staring at her booty a split-second before.

"Umm...I said hey" Becky grumbled in a tired but characteristically sassy manner.

"Hey...sorry...yeah hey..." Liam awkwardly cleared his throat as he made sure to tuck his bottom half under the table to hide his raging boner from view, "...kinda tired...didn't sleep too well", he lied.

"Whatever..." Becky said, turning back around. Her blonde hair was sort of messy, tied up in a bun as she walked off with a yoghurt pot and decided not to sit next to her annoying little step-brother for breakfast. As Becky walked out of the kitchen, Liam strongly fought the urge not to turn his head and watch her ass bounce behind her in those pajama shorts. It took a crazy amount of willpower, but Liam survived, drinking his icy cold water to shock his mind out of his horny malaise.

After eating his breakfast and continuing with his morning routine, Liam started to feel a bit better. Thankfully, Becky didn't re-appear out of her room that morning, meaning Liam wasn't overloaded with any additional sexual triggers as he prepared for work. Liam said goodbye to his parents, who were leaving for a weekend away that morning. His thoughts turned to how he was going to survive the next 48 hours to complete the challenge. For all of Liam's faults, he was desperate to complete No Nut November to prove to himself that he did have willpower, and that he could turn his life around and possibly give up gooning for good. However, when he arrived at work, Liam was instantly tested during a business meeting his boss Mark made him attend and take notes for.

"As you can see with targeted, aggressive investment during THIS phase of the production cycle, we see above average growth for the subsequent three financial quarters."

As these words left the business woman's mouth, Liam's mind filtered them out and focused on her appearance. His instant attraction to her olive skin tone, dark hair, and of course her large breasts, was clouding his ability to hear what she was actually saying. The woman, whose name Liam hadn't paid attention to on account of being distracted by her subtle cleavage, wore glasses that made her look professional in spite of the slightly low cut of her blouse. Liam's porn-deprived gooner brain created a fiction out of the words she said as he gazed at her chest. "As you can see with jiggly tits and an aggressive handjob, interest in turning your balls into a spunk cannon factory could cause an above average growth in your pants. If you come back to my quarters, I'll suck it for you right now."

Liam's mind wandered off into the realm of imagining her jerking him off while watching her tits bounce as she did it. Sure enough, that incessant boner returned, causing Liam to cross his legs awkwardly to hide it. Suddenly, his depraved thought train was interrupted.

"Liam...did you get those stats down? They are important." Mark urged, as Liam returned from his porn-erific daydream.

"Umm...could you repeat them for me one more time please...just to make sure I got them right." Liam's quick wit saved him, just! But he realised he was walking a fine line. All of this arousal was getting to him. I just need to make it to the end of the day, and then it's the weekend. One final push! Liam worked extra hard during the rest of the meeting to stay focused on the topic. He avoided looking at the woman unless he had to, and managed to survive without any further mishaps.

As lunch rolled around, Liam thought ahead to the weekend. With his parents out and no plans for Saturday, Liam knew that he would need to overcome any final temptations. Becky was also out for the day as she was at a friend's party. Ordinarily this situation would be ideal for Liam to have a big old goon sesh. One big push...36 more hours! I can do this!! Liam made a plan to go to the gym on Saturday morning, as exercise usually helped him take his mind off gooning.

As Liam finished his lunch he began opening the double doors to exit the canteen, but he noticed a familiar flash of brown hair on the other side. Doing the gentlemanly thing Liam held one doors open to allow his crush Sabrina through.

"Hey!" she said with an enthusiastic smile.

"Hello!" Liam responded, trying and failing to think of a way to strike up further conversation with her. However, as Sabrina passed by, twisting her curvy body to move past Liam, she very slightly, and accidentally, brushed her ass against Liam's groin. Holy fuck! Liam thought to himself as the pleasure of even the briefest touch of her soft rump got him instantly stiff. Now I have to get THAT out of my mind too! For fucks sake!

Liam berated himself as he could not stop thinking about that sweet sensation. As he returned to his desk, Liam forced himself to hyper-fixate on writing a report, not allowing himself even a millisecond to think about anything else until it was suddenly 5pm. Okay, it's done! I've made it through work!

Liam returned home and smiled to himself, feeling like a bit of a weight had been lifted off his back. No more work-based distractions, I have a plan for tomorrow - I can do this! I can feel the finish line coming! As Liam cooked himself dinner, he heard the front door open and close, and knew that must have meant Becky had returned from work later than usual. To his surprise, when she came into the kitchen she was wearing a tight fitted gym kit. A baby pink tank top on her torso that was barely preventing her teats from popping out, and tight black leggings that were ever so slightly see through.

"H-hi..." Liam said as she came into view. "...I thought you didn't go to the gym on Fridays?" he asked politely.

"I normally don't, but Ellie didn't have anyone to go with so I said I'd go with her. Why?" Becky responded, dabbing the beads of sweat on her forehead with a small flannel. She then fiddled with and accidentally dropped a hairclip, prompting her to turn around and bend over in front of Liam to pick it up.

"No...I mean...no reason...you'll be hungry then? Want some of this?" Liam pointed towards the pan of food as his familiar boner returned and his eyes drifted towards Becky's nipples that were ever so slightly poking through the fabric of her top.

"What? Burned onions and rice? No thanks!" Becky chortled arrogantly, as she pointed out the fact that Liam had kept his attention on her for too long and was now starting to burn the onions. "I'll make myself something when you're done burning the house down." she continued as she walked out of the room.

Liam was so hard it hurt. His tip started to leak against his underwear causing a damp patch to form down there. He gritted his teeth as his stiffy became increasingly uncomfortable. At least she'll be out of the house tomorrow, he told himself. As Liam heard the shower turn on, he tried his damndest not to picture his step-sister naked, which was particularly difficult after seeing her in such a revealing gym kit. Normally this wouldn't bother him so much, but he had now gone 29 days without jerking off, so this became an unexpected trigger for Liam.

Liam's boner simply wouldn't go down as he ate his dinner, and he impulsively decided to take himself to the bathroom, and give himself a talking to in the mirror under his breath. He grabbed a hold of his rock hard cock over his shorts and tried to motivate himself. "24 more hours, that's all...then it will be done! Ignore any weird thoughts, and just keep going!" This little pep-talk got Liam through the evening and night, as he also successfully did everything he could to avoid being in the same room as his step-sister.

The next morning Liam's morning wood was even more intense. From the moment he woke up it was twitching and throbbing like never before. Unlike yesterday, his boner did not subside once he started preparing himself for the day. Damn it!! It just won't go down! Liam tried to follow the same formula as yesterday in busying himself and staying away from his step-sister. It worked, and Liam promptly left to go to the gym on what was a hotter than normal day. Once I get back Becky will be out at that party and I can just relax. It will be ok! he reassured himself as he arrived at the gym.

The next hour consisted of Liam only doing exercises that would also hide his boner. He would get the occasional 10 minute reprieve where it receded into a semi. However, these periods were short lived, as there were so many attractive women in the gym it wouldn't take much to get his cock standing to attention once again. Liam struggled through the session and had a cold shower to finish, which did work in successfully ridding him of his boner. Liam busied himself by browsing some local shops, being sure not to look at any women while he did it, and also taking a long drive and listening to some music. By the time Liam was finished up and decided to return home it was 4pm and he knew Becky would have left for the party by then.

However, when Liam returned home he noticed something strange. Becky's keys were still in the pot by the front door.

"Hello?" he called out in confusion.

"Hey!" Becky called back distantly from upstairs.

What's she still doing here?! Taking ages to get ready?! I CAN'T see her in a hot dress...I CAN'T! Liam thought to himself as he walked upstairs. But however much he tried the sexual thoughts were simply too overbearing to handle now. His boner returned with a vengeance as he imagined his blonde beauty of a step-sister in all manner of skimpy outfits, all dolled up. Straight to my bedroom! I can hide in there! he told himself as he traipsed up the stairs.

Liam opened the door to his room and jumped as he instantly saw a figure laying on his bed. It only took him a moment to recalibrate, but what he was seeing made no sense.

"B-Becky?! What are you...aren't you meant to be at the party??"

Becky was laying down on her front on Liam's bed facing away from him. She was wearing a tank top, Liam instantly knew it was the one that read "Princess" with a crown on the front, but more notably she was wearing light yellow short shorts that were not hiding her ass one bit. Becky's thicc creamy thighs protruded out of these shorts, as did the lower part of her plump meaty ass cheeks, the valley of which seemed hungry to gobble up as much of the fabric as possible. Becky's long blonde hair covered her upper back, which seemed to just accentuate how curvy and perfect her rear was. It was needless to say the perfection of this sight crushed any remaining willpower Liam thought he had. All he could think about was how badly he wanted to stick his dick in her right then and there. His erection throbbed in his pants like it was trying to conduct an orchestra. It hurt with how hard it was, it was so incredibly uncomfortable. Liam wondered if he might just jizz in his pants with how tight his balls and cock felt. A million thoughts of goon-filled filth raced through Liam's mind as he stared, mouth-agape, at his step-sister's forbidden dumptruck.

Becky seemed to be texting away as she responded to Liam's question, not dignifying his presence at all by turning around, just ignorantly and lazily tapping away at her phone as she laid there blissfully unaware of what she was doing to Liam right now.

"Oh...yeah...basically Alexis is ill...so her party is off." she explained.

"Mhm..." Liam was fighting his urges like his life depended on it, he was so horny he felt like he might pass out. Whilst it seemed to be a losing battle, Liam just about managed to continue the facade of an earnest conversation. "A-and...why are you...in my room?"

"Ohh it's way too fucking hot in this house. My fan's broken, all the other rooms are boiling hot. Yours is the only cool room." she explained in a rather entitled manner, re-adjusting herself a bit and inadvertently causing a magnificent ripple effect on her ass cheeks.

Liam instantly grabbed his cock in reaction. It felt like it was going to explode at barely a moment's notice, and his hand's touch it felt so good, so right. Just imagine how sliding it in her slippery cunt would feel! Liam couldn't fight these thoughts anymore, they were running riot in his mind. The goon-demon had taken back control over Liam's brain and there was no return now. He didn't say anything further, he just instinctively pulled his shorts and underwear off in a quiet sweep. As they fell to the floor his hot, twitchy cock sprung upwards into the cool air. It was all red, swollen and veiny. It was also the hardest it had ever been in Liam's life, it was like touching a diamond. The tip was soaking wet, oozing with pre-cum. Becky had no idea her step-brother was right behind her with his ridiculously hard cock out, closing in on her. Instead she tip-tapped away on her phone with little regard for their conversation.

Liam slowly approached the bed, now naked on his bottom half. It was like a primal switch had been flipped in his brain, he had gone full on feral. His biology was simply seeking a hole to breed and all consequences for his actions were clouded over by this overwhelming urge. There was no grace or poise to what he was doing. Liam reached down, hooked his fingers into the waistband of Becky's shorts, and without warning swept them off her in one swoop, throwing them to the floor messily and giving her no time to even know what was happening.

"Bro...w-what are you...?" Becky said, a little slow to react as she felt her shorts get swept off her body in an instant.

Liam didn't use his words, he used his actions to explain himself. As his heart pounded in his chest and his cock throbbed harder and harder the closer it got to that sweet sweet relief, Liam also noticed how heavy his balls felt underneath him. He clambered on the bed before Becky could react and he nudged her thighs apart with his knee as he moved himself in between her legs from behind.

Becky tried to turn around to see what was going on, but Liam prevented that by roughly taking two fistfuls of her plump rump in his desperate hands, squeezing it firmly and holding her cheeks slightly apart to manoeuvre himself into position. "Hnggg so fucking perfect!" Liam grumbled animalisticly as he finally learned what it was like to grope Becky's perfect ass. It was even softer, squishier and meatier than he could have possibly imagined. He then leaned down, bearing over her. Liam inhaled the luscious feminine scent of Becky's hair as his leaky tip lightly brushed against her exposed ass cheek, causing a jolt of primal pleasure to surge through his cock and up his spine, making Liam shudder in delight. Liam growled like a beast as he felt the first jolt of pleasure he had experienced in 29 days. Liam's torso was now pinning Becky in place on the bed as she finally realised exactly what was going on behind her.

"Bro...what the fuck do you think you're doing?!" Becky wriggled a little to try and look behind her and scowl at Liam brattily, but now couldn't move under Liam's weight. It had all happened so quickly she barely had a moment to react.

Liam felt the excitement and anticipation of how close his cock now was to Becky's prized honey pot. Liam had always dreamed about what it would feel like to stuff her full of cock, especially so within the past few days. Now he was merely inches from realising that dream, and truly knowing what it would be like.

Becky had always adored the feeling of getting her ass kneaded whenever she hooked up with someone, and as such the sensation of her step-brother digging his strong hands into her firm booty meat triggered an arousal response within her. Becky's kitty dampened immediately, before she could even process what was going on. She had always ignored and dismissed her younger step-brother, and this was so out of character, and so unlike him that the surprise continued to make her freeze in disbelief for a few moments.

But a few moments was all Liam needed. He pressed his hips downwards, and tried to find her tiny little opening. His slickened tip struggled to find her hole at first, gliding along the length of her slit and missing the target. But nature could not be denied much longer, and the desperation Liam felt in his cock for the relief of her pussy grip could not be contained.

"W-wait...you can't-" Becky panted, still taken aback by the sensation of Liam trying to tuck his cock away in her folds.

Liam was so horny he couldn't even hear her. He re-angled himself, this time lining up right on the point of least resistance, and immediately he shoved himself into her sweet spot. His untouched, backed up, needy cock finally found it's way home. "HNGGGGFFFUCKKKK!" Liam groaned guttorally as he bottomed out inside her. He could have easily cum right then just from one pump. His cock squirmed in utter delight, all nestled up inside Becky's tight little coochie. The wet grip kept making Liam's cock flinch after only one pump. Holy fuck holy fuck holy fuck! I'm not going to last!! Shittt! Liam immediately started to overdose on pleasure, looking down at his cock completely swallowed by the view of her jiggly snowglobes.

Becky wriggled a little under the weight of Liam's body but to no avail, and Liam took advantage of her continued speechlessness. He pulled his hips back and slammed them back down abruptly, plapping her big ass loudly, and spearing her cunt with brutish force. Liam made an unholy noise as he bottomed out once again". However, this time a delicate little whelp came out of Becky's mouth in an angelic feminine tone that made Liam's balls tingle.

"Bro we...we can't...this is so fucked up-" Becky reasoned, but her sentence turned into another angelic moan as Liam interrupted her by slamming his cock into her slippery twat again for a third time. After this, Becky's wriggling seemed to stop.

Her ass! Her moans! Her GRIP! FUCKK! I CAN'T HOLD BACK!! Liam realised that even if he didn't move, with his cock wedged in the deepest parts of her slick cunt, he was about to violently explode cum inside her. So to save himself the embarrassment of being called a three pump chump by his bratty step-sister, he decided to pick up the pace, and get a few extra pumps in, just to stat-pad. He started piping her as quickly as he could, and his cock began throbbing and thrumming in overdrive. Liam felt the cum rising in his backed up balls and he involuntarily starting groaning loudly from his chest and his eyes rolled back into his skull from the sheer joy. Liam threw all his weight behind one last triumphant pump and groaned like a beast being slayed.

"I'M SORRYYYYARGHHHHHHAAAAAAAAAAAAAFUAAAAAAACKKKKKKKKKK!!!"

Liam's cock pulsated like never before as he flung the fattest wod of jizz he had ever shot in his life deep inside his step-sister's tight, pristine snatch. His cock had never cum this frantically before. He felt it writhe and pulsate in overdrive for what felt like a full 60 seconds, and the entire time Liam dumped and insane amount of jizz inside of Becky. Liam simply held himself as deep as he could inside her, and rode out the heavenly pleasure of shooting 29 days worth of backed up spunk inside his step-sister.

Liam's orgasm slowed, and as the arousal brain-fog started to lift, he immediately began questioning what he had just done. There he was, on top of her, both of them out of breath, his cock hanging out the back of her, and the post-nut clarity hit like a train. Fuck fuck fuck! What have I done?! What have I done?!

"Bro...what the f-" Becky started to say.

"I-I'm sorry...I'm sorry!" Liam pulled out of Becky and a hefty glob of cum instantly followed his retreating dick, dripping onto the bed. In a panic Liam grabbed his clothes and ran to the bathroom. Literally running away from the consequences of his actions. What have I just done?! I've fucked my whole life up! I'm such a fucking failure!! A few minutes later Liam heard the sound of Becky's footsteps pass by, as she went to her bedroom and slammed the door behind her. No no no....what if she tells mom and dad?! What if she hates me now?! Arghhh! Liam got dressed and went back to his room, shutting himself away. His neurochemistry was rebalancing now, and he was no longer plagued by the demon of horniness. With that monkey off his back, the post-orgasm relaxation did eventually mellow out his panicked thoughts and cause Liam to feel sleepy. As he drifted off thinking about his action, he sleepily reflected on what he had just done.

Maybe I've alwawys been attracted to her? Maybe that's why I watch step-porn? No! No! I can't be like that! I have to apologise and tell her not to tell anyone about this. I will never let this happen again. I'm so over it - it's done! As Liam drifted to sleep Becky was contemplating things herself.

It had been a long time since Becky got laid. The messiness of her last break up had her swearing off men for a while, and she never expected something like this would end her streak. Initially, she was bewildered and angry that her little twerp of a step-brother tried to pervetedly force his way with her. However, as soon as her groped her ass, Becky's recent lack of sex-action made her start to change her mind. It's wrong...so wrong! He shouldn't be doing this to me! We shouldn't be doing this! she told herself moments before she felt Liam's cock invade her body. However, when she felt how stiff she had made him, it made her feel pretty in a way that she hadn't felt since her break up. An unexpected rough fuck? He might be a little twerp but what if he's secretly a good fuck? Hmm... she thought to herself when she stopped fighting back and let Liam have his way with her. However, Becky's curious optimism was short lived. They had barely got going when Becky felt Liam's cock start to squirm against the snug grip of her wet twat, and she knew full-well what that meant.

In total, Becky finished him off in 30 seconds, and as soon as she felt like she was starting to get into it, it was over! That fucking selfish little prick! she fumed to herself as she felt Liam shoot a torrent of spunk inside her. It's always about him...he never thinks about others!! Becky's anger returned. He thinks he can force himself on me and then only fuck me for 30 seconds?! What a fucking dweeb! I will get him back for this! Becky did Liam the very generous courtesy of allowing him to complete his lengthy orgasm before starting to vocalise her opinions. However, Liam spooked quicker than a bird in the bush as soon as Becky started talking, and he hurriedly apologised before running to the bathroom.

Now he won't even fucking talk to me, the little twerp! After I've let him just do that?!?! Fucking asshole!! Becky raged, as she stormed off to her own room to clean herself up. "I'm going to get him for this! No way is he getting away with this scott-free!" she whispered to herself angrily as she concocted a plan in her room.

30 minutes later...

Liam started to stir out of his post-nut nap, and tried to peacefully roll over. But he couldn't! Liam's wrists were tied to his bed post. The shock of this realisation jolted him awake instantly. Liam struggled, unable to move. He looked around in a panic and sure enough he saw Becky sat on a chair at the foot of the bed. She looked at him with a disappointed glare and a raised eyebrow.

"What...what are you doing?!" Liam asked in a panic.

"We need to talk." Becky said calmly, "And I don't want you running away from accountability like you ALWAYS DO!" she continued, less calmly.

"Look...I'm sorry about what happened. Something came over me." Liam responded.

"No no. Something came in me. YOU! What the fuck Liam?!"

"I'm sorry, I'm sorry!"

"No. You don't just stick your dick in someone without asking bro! That's superrrr fucked up! You know that's technically r-" Becky was about to tell him exactly what he was before Liam interrupted.

"No please. Don't say it! I'm not that! I-I-I can explain. Listen...I was trying to do No Nut November. I have a problem. I jerk off too much..."

Becky scoffed loudly and crossed her arms. "Are you about to tell me you're one of these guys who watches step-sister, step-brother porn and you thought you'd try it out for real? That's sooo fucked up!"

"No. No! I'm just saying that these past few days I've been really struggling! It's been 29 days - it's been getting to me, bad! You don't understand what it feels like to not cum in 29 days!" Liam tried to reason.

"Oh don't I? I've been fucking abstinent since I broke up with Kyle. You don't see me going around trying to ra-"

"Please don't say that word! I'm not that - I'm a nice guy! Please! I would have totally stopped if you told me to. You seemed to...not want it to stop."

"Oh did I? Suddenly you're an expert on what women want, hmm? You didn't give me much of a choice before you started though, did you?" Becky replied sternly.

"No...I know, I'm sorry. Look let's just forget this ever happened. Nothing like this will ever happen again and I will never ever watch step-sister porn again. I'll put all of this behind us and we can go back to the way things were!" Liam pleaded.

"No. You won't change. You won't change unless you feel the consequences of your actions." Becky stated.

Liam gulped in fear, unsure of what she was going to do. Please don't tell mom and dad! he thought to himself. However, Becky didn't say anything. She simply stood up, placing her hands on her hips before leaning over the top of him.

"You need a taste of your own medicine!" she said, pulling Liam's shorts off him without warning.

"No no...wait! We really shouldn't...we're step-"

"Too late dude! You fucked up real bad, you opened the can of worms!" Becky said, pulling her top up over her head.

"No...my cock is too sensitive now. I won't get hard. It won't work..." as he said those words Becky's tits came into view for the first time. Oh fuck! Liam's cock wanted to rest in peace, it was overstimulated after being deprived for so long. I won't enjoy this...oh wait! I guess that's the point! Liam realised, as his cock started to inadvertently harden. Her tits are so fucking nice and bouncy!

"It's my fucking turn, mmkay? You got yours...now I'm getting mine!" Becky demanded, whipping her shorts off and climbing on top of Liam. She rubbed her hand on her went cunt, making it squelch, before rubbing the moisture into Liam's overstimulated, but growing, cock.

"Hhhhh...aghhh....ffffff!" Liam groaned through gritted teeth, as her touch slightly stung him down there. Too soon! It's too soon! How am I getting hard?! "Can you at least untie me so I can...ummm...like grab your ass and stuff? That might help?" Liam chanced his hand, but to no avail.

"Fuck no...a twerp like you doesn't deserve a sweet deal like that. You will have to save that feeling for your fucked up little perverted wank bank." Becky leaned in closely again, "you are neverrrrrr touching my ass everrrrrr again!" she taunted.

Her words were like a dagger in Liam's heart but for some reason hearing that made him even harder. This is my last ever chance to feel her pussy around my cock ever again! Fuck!

Becky lined his stiffy up with her opening, and sat all the way down on it. That feeling of being balls deep in her returned, but it was nowhere near as pleasurable as it was the first time. "Owwwwch!" Liam moaned as his step-sister swallowed his cock with her coochie once more.

"Shut up, dweeb! This is my turn, and you'll take it like a good boy!" she said before she started to jump up and down on his dick. Becky threw her ass down on him like she was twerking in a rap video.

"Ohh fuckkk!" Liam said, gritting his teeth and frowning as he tried to ride through the overstimulation. The sight of his cock re-appearing then disappearing inside Becky was majestic. As was the sight of her tits bobbling up and down in front of his face.

Liam so desperately wanted to touch Becky all over, but he couldn't due to his hands being tied down. Fuck...this is torture!!! Slowly his dick started to become accustomed to the sensation of being inside her once again, and it started to feel less painful.

Becky wasn't concerned about Liam though, she was focusing on herself and intended on making the most of this weird situation. She loved riding cock, especially a cock as stiff as Liam's was, and she had perfected hitting the exact angle that always made herself cum.

"Mmm you can't help but get hard for me, ughhhh!" Becky's pussy pulsed as her thicc thighs and big ass plapped loudly, ricocheting off Liam's hips as she showed him how a real woman rides. "Hnggg yeahhh right thereughhhh!" The plapping sounds became wetter and wetter, as Becky began flicking her clit whilst bouncing on her step-brother's dick. She moaned as she felt her pussy pulsating in overdrive and her own orgasm built up. "Yeahhhh I'm gunna fucking cum, I'm gunna fucking cum!!!". That dick prodding her guts just right was just too much, as was the stimulation on her charged up clit. With an angelic scream of delight, Becky came hard! Not only did she cum, but for the first time in years she started squirting all over her bratty step-brother, with little regard for him. "Ohhhhh fuckkkkkk ughhhhh!" Becky moaned as she rocked herself back and fore on his stiffy and her cheeks flushed pink.

"Oh wow!" Liam remarked, having never experienced anything like that before. "That was...cool!" he nerdily remarked as he looked up at her, all impaled on his cock which was now starting to feel pleasure again.

"Yeah? You reckon you could cum again?" Becky asked.

"Ohhh...umm...yeah I'm actually kinda close after seeing that..." Liam said excitedly.

"Good!" Becky simply remarked, turning around and putting Liam's dick back into her, and riding him reverse cowgirl.

"Oh fuck...that ass! Hnggg!" Liam's eyes widened again as he stared at her magical rump. He so desperately wanted to touch that ass again, but it remained out of reach for him due to the wrist ties. Instead, all Liam could do was lay back and enjoy the show, as Becky jerked him off with her pussy, and those snowglobe ass cheeks bounced and rippled off his hips like he was in heaven.

"Oh my god! Oh my god! I'm...ughhh fuckkk...I'm getting close! Shitttt!" Liam wailed in heightened arousal.

"Oh yeah? You're gunna shoot your spunk in your step-sister again, hmm?"

"Holy fuck...yeah! So fucking hard! I'm going to cum inside you so fucking hard. Don't stop! Don't stop! I'm...I'm gunna...I'm gunna!" as soon as Liam said those words Becky abruptly lifted her ass up off him causing Liam's cock to flop out of her with a sad thud.

"PSYCHE!" she said loudly.

"Wait...w-what...what are you doing?! Don't stop! Please!!!" Liam pathetically begged.

"Umm nah, actually I'm done. Bored of you now!" she said in the sassiest way possible as she stood up and put her clothes back on.

"W-wait...untie me so I can finish myself off!" Liam begged.

"Umm...how about no! You can cool off for a bit...twerp!" Becky grinned evilly before leaning into Liam until her face was only inches from his. "And that's the last time I'll ever touch your cock, ever again!" she whispered before turning and walking out the room.

Liam's cock was seconds away from heaven, but now his orgasm was fizzling away as his cock softened by the second, and there was nothing he could do about it. Fuck! What a fucking bitch! Ughh! Liam didn't enjoy tasting his own medicine. However, Becky left feeling satisfied, and more importantly she felt justified and even.

Liam on the other hand started to realise that he fucked up the opportunity of a life time. This whole time Becky was as sex-crazed as me, and if I played my cards right we could have been life-time fuck buddies?! Nooo! Now she doesn't want anything to do with me! Liam closed his eyes and spent a few moments rueing what could have been. At least I can take that one perfect fuck to the grave with me. That was the best orgasm I've ever had, by far! Liam comforted himself as he closed his eyes and pictured it in his minds eye once more. There she was, laying down on her front, that perfect perky ass on a platter for me, watching her take every inch of my desperate cock.

Liam's step-sister obsession wasn't over. It had only just begun!
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