Woo! The first actual sex chapter in almost two years now! Man, time flies.

"Oh god- OH GOD~!"

You immediately shut her up with your hand over her mouth as you kept thrusting inside of her.

"Stop making so much noise! It's like you want Mom to catch us again, you selfish bitch!"

Shelly whined a bit before remaining as silent as possible, even as she kept breathing like a banshee.

For the first time since this new incestuous relationship started, you were the one actually taking the lead this time. When you had woken up, an unexplainable feeling of frustration swelled up within you to the point where you just couldn't hold back anymore.

Dammit, you were in the middle of doing something so important, whatever it was, but Shelly just had to go and pull another one of her crazy stupid stunts just to get under your nerves!

Always forcing you to let her blow you, always pushing you to keep doing whatever she wanted, always riling you up and putting you in stupid positions where you couldn't go against her-

And what did it fucking lead to? The both of you getting caught by Mom!

Despite all that though, despite literally having your secret relationship be revealed so quickly simply because she wanted to make you cum from risky sex, despite going through the humiliation of being caught, she decided to keep doing what she wanted and sneaked into your LOCKED room just to fuck you without your consent.

Even though you expressly told her NO so many fucking times, she still fucking did it anyway!

"J-John! It's too rough! I-I'm not used to it-" Shelly grunted as quietly as possible, before you interrupted her.

"Shut up! Just shut up already! You're the reason why I'm so angry right now! If you had just listened to me when I said no, you wouldn't have to go through any of this right now, so just shut up!" You growled.

You just needed to vent somehow. To let out all your frustrations. At this point, you were bottling up so much anger and stress that you wouldn't be able to contain it any longer. You had to get rid of it all in some form or another, otherwise you'd go crazy right now.

So of course, you decided to vent it all on the selfish bitch who's been the pain in your ass for so long now. You held her down on the bed and **** yourself on top of her, keeping her arms against the pillows, and roughly plowing her pussy over and over until you were satisfied.

Your cock continuously drilled into her over and over like a machine, rough and course in your movements, not even the littlest bit gentle in the slightest. Even when the muscles inside her pussy tightened in response from the rough movements, causing her discomfort or even pain, you couldn't find myself to care about her satisfaction at all. All that mattered to you, was to be as fast and rough as you want in order to make yourself cum as fast as possible.

"John, please! I can't take it any more!" Shelly cried, "Slow down!"

"I don't want to hear any complaints from you!" You grunted, "This is what you wanted! This is what you broke into my room AGAIN and decided to risk getting caught by Mom again for! You just couldn't help thinking about your own satisfaction, could you?! You just had to have one last final fuck from me, even if it means ruining our family life forever! Go big and risk it all since this might be our last day together before Mom and Dad **** us apart and take us to mental facilities to check our sanity! You didn't care to think what would happened if we got caught, all you cared about was the pleasure of my **** dick inside your stupid whore pussy!"

"I get it! I'm sorry!" Shelly began having tears swell from her eyes as you bomblasted her with guilt after guilt, "I'm sorry, so please-"

"I'm sick and tired of only doing what you want, Shelly! I don't care about what you want anymore! Why don't you start thinking about what I want for once?!"

Shelly couldn't even respond as she closed her eyes and tried to endure it, her tears rolling down as she made a mess of her face.

Despite it all though, a part of you couldn't help but think that Shelly might actually be enjoying this on some masochistic level. As you kept going, repeatedly thrusting inside of her, you could feel her inner muscles start to loosen their grip, allowing easier access inside of her. Her pussy became much wetter and more lubricated as time went on, and her arms began to weaken until they went slack, no longer resisting you.

Even though you knew this was wrong, it just felt too good to stop. You couldn't care less about Shelly's enjoyment about this anymore, whether she was liking it or not. You just wanted to focus on making myself feel good as much as possible.

She felt so different compared to Bella. Shelly's insides were much softer and easier to penetrate, which was no doubt because of all of her experience with other boyfriends she had over the years. Bella was much tighter and had a stronger grip since she had been holding out for so long until she let you inside of her.

Still, it didn't feel any less good. Some part of you must genuinely be into **** too if you were feeling this great inside your own sister's pussy, despite it being much looser than your history teacher's.

Maybe this was why you always told her no to vaginal sex. You were probably scared of letting this happen because you didn't want the last part of your innocence and normalcy be corrupted into loving the smooth feeling of your biological sister's cocksleeve. If you knew it was going to feel this good to just be inside her, you might have never fought back and rejected her at all whenever she offered to let you fuck her. You couldn't admit that you were into **** just yet, so you only restricted her to blowjobs only.

This was a point of no return then. From here on, your relationship with your sister will never be the same ever again. You had to admit to yourself that you couldn't see Shelly as your sister anymore, but a woman with an amazingly sexy body that every men in the world would kill just to get their hands on.

It disturbed you. It excited you. It made you want to go all out and not hold yourself back any longer.

As you kept plowing into her, you brought your head down to start sucking her nipples, enjoying the incestual act for all it's glory. With no reservation left within you, you enjoyed touching and smooching your sister's body as much as you want while continuing to fuck her like a wild animal. Shelly could only moan from the new sensation on her nipples, doing her best to keep quiet throughout her **** session.

Fuck, your sister was such a sex doll! It's amazing how much willpower you had within you to resist her for so long!

God, now that you've had the taste of Shelly's forbidden incestuous fruit, you couldn't stop yourself. Her body felt so good, you would never be satisfied this being a one time deal anymore. You would love to do this to her body every single god damn day!

...

But you can't, can you?

Because after today, you and Shelly would need to face your Mom confronting all of this. After today, you'd probably never get another chance to do this ever again.

Your parents will **** you apart in order to put a stop to your incestuous crimes. You'd probably be kept under watch for the rest of your life, just to make sure this never happens again.

Maybe that's why Shelly snuck into your room today to **** herself on you. Because she knew that if she wanted to get away with this, she'd have to do it on the last possible night where you would still be together.

In a way, you could understand her. Like a heroine addict doing one last shot of junk before going cold turkey for the rest of his life. She wanted the last time to as memorable as long-lasting as possible.

Because this will be the last day you'll be together. As siblings. As lovers.

...

You stopped thrusting your hips, pausing to give Shelly a chance to recover her bearings as your mind calmed down and your frustration subsided.

It took a moment for Shelly to notice that you stopped. She had been breathing heavily and staying silent for the last few minutes, letting you do whatever you want with her body. But when she felt that her body wasn't being violated anymore, she readjusted her eyes to look up at you.

"W-Why'd you stop? I thought you were still angry at me..." Shelly muttered, obviously relieved and yet still somewhat disappointed.

You couldn't help but look into her eyes as you felt pity for her.

Christ, despite it all, you were still a softie in the end. All that anger and frustration amounted to nothing now. No matter what she did, you could never stay mad at your own sister. Not even when she does stupid, selfish, idiotic stuff like this...

"You know, if you weren't such a bitch towards me for most of your life, and you weren't my sister, I would have liked having you as my girlfriend." You admitted, both to her and to yourself.

Shelly eyes widened a bit before she quickly looked away with a blush, "D-Don't say something so embarrassing all of a sudden... Weren't you hate-fucking me just a second ago? What happened to all that momentum?"

"Just wanted to be honest for a moment, since this might be our last time together after all..."

"...idiot..." Shelly muttered depressingly, "Stop wasting precious time and just... do whatever you want..."

Fine then. You will.

You made a quick mental note to apologize to both Bella and Tiffany later the next time you saw them for what you were about to do, before leaning down.

Shelly was shocked to feel your lips connecting with hers, just in time for you to resume thrusting your cock again as rough and quick as before.

"MMPH?!" Shelly muffled against you, becoming even more confused when you started pushing her lips open with your tongue and decided to wrestle with hers. All that experience with Bella was starting to be put into good use here as you played around with your sister's tongue in your mouth. Shelly was bewildered at first, before slowly mellowing out and accepting you as she fought back with her own tongue techniques.

Your personal views on kisses being sacred as a symbol for love between lovers was still the same. You weren't making an exception for your sister persay, but more like you were starting to accept her as someone who was more than just a sister to you. Maybe it was the heat of the moment, or the idea that this will be the last time you'll ever see each other again, but you were willing to let your inhibitions to step aside to be honest with your feelings for the first time.

Your rough fuck session was renewed once more, but now with a more romantic twist instead of an angry one. You put less pressure pushing down her arms and legs, which allowed her to let her body react on it's own, pushing her hips up to match the timing of your thrusts.

Slowly, one hand reached down to grope her boobs, while the other hand went down to hold the back of her head. Shelly used this opportunity to let her free hands wrap around the back of your neck into a firm hug.

The room was filled with the wet sloshing noises of your cock slapping against her pussy, the lashing between tongues, and the bouncing creak of your bed.

Christ, you really hoped that you were both quiet enough not to wake up your mom during all of this. If she managed to hear all this happening and come up to check on you, she probably won't be as embarrassed as the last time. No, she'd definitely get upset and start screaming at you both this time around.

Still, you enjoyed each other's touch as two siblings finally giving in to their taboo desires. For the first time ever, you both were able to connect with each other on a physical and spiritual level. For the first time ever, you really started to get each other.

Went the burning sensation in your cock started to heat up, you pulled away from your makeout session with Shelly and warned her, "I'm about to cum..."

"Do it, little brother." Shelly begged, giving ragged breaths, "Fill your big sister up with your delicious jizz. Let's cross the line together."

With her permission granted, you resumed sucking each other's faces as the pressure within you started building up to the point of no return.

One last final thrust was enough to make you shout in pure ecstasy inside your sister's mouth, just as she did the same. Both of you came in marvelous fashion, with you filling up her insides with a massive ropes of semen just as she was pushing it all out in a huge gushing wave of her own lady-juices.

Your fluids spilled all over, making a mess of your sheet covers and mattress.

After a long, long, looooooong satisfying conclusion, you finally released each other and gasped for breath.

As Shelly tried regain her stamina, she asked, "So... was that... as good as... your first time...? Or better...?"

You continued breathing silently as you thought how to respond. In the end, the best you could think of as a snarky retort was, "Not even close in comparison."

Shelly couldn't help but chuckle, "Cheeky asshole..."

With that, Shelly pulled you back down to kiss you again.

You didn't pull away this time, now that you've finally accepted her feelings.

Damn it though, you were going to be feeling so guilty about this later when you meet up with Bella or Tiffany today... How were you going to apologize for cheating on them with your own damn sister?

Agh, what a fucking conundrum... Disgusting three-timing bastard...

For whatever amount of time you guys had left though, you enjoyed each other's touch.

---

Morning arrived.

Both you and Shelly managed to clean yourself up and got rid of all the evidence of last night's escapade before Mom could wake up.

Since both of you already woke up earlier than her, you both decided to just get ready by dressing in your school clothing and sit patiently in the living room to face your judgement together.

Both of you were fidgety and antsy for what was to come. Neither of you knew what exactly your mom was going to do with the two of you. Worst case scenario, she gets Dad involved and have you two separated for the rest of your lives, both of you sent to different mental facilities as your incestual fetishes will be treated like a mental disease. Best case scenario, you both get disowned, kicked out of the house, and **** to live out on your own.

Neither was exactly more preferable than the other.

After a long while of patiently waiting, spending your last moments together longingly staring at each other from across the sofa seats, Mom finally arrived down the stairs.

She looked up in surprise after seeing the both of you, giving a small, "Oh, you're both here already." Then with a tired sigh, she muttered, "Good. The sooner we get this out of the way, the better."

Walking across the room, Mom chose to sit down on the sofa chair right next to you both in order to have both of in her line of sight.

The tension in the room grew as both you and Shelly became much more awkward and fidgety under her stern stare.

For the longest while, Mom remained silent as she studied the both of you.

You could only imagine what was churning in her mind. What was she planning to say? How was she going to react? You knew that this moment was coming, and yet you couldn't help but feel like you could have done more to prepare for this.

Are you truly going to sit there and accept whatever punishment was to come? Will you seriously just sit there and take what's coming without putting up so much of a fight?

If you don't do anything, then your fate will be sealed. You'll never see Shelly, your big sister, ever again. Your family might not ever recover from something like this ever again.

Sure, this might be what you justly deserve for fooling around with your sister in the first place. But now that everything has happened last night, now that you finally realized how much Shelly meant to you, are you willing to just let whatever happens happen?

A part of you couldn't help but find this whole situation unfair in a way. Like a story reaching it's ending halfway through before it could even get to the good part.

If you truly let things play out here, you might regret it for the rest of your life.

...

There's no way you could accept that. Not now. Not ever.

"So... will the two of you care to explain what I saw yesterday when I came home?" Mom finally began asking the hard hitting question.

Shelly turned to give one last final look at you before deciding for herself to take all the blame as she stood up first, "Look Mom, this was all my id-"

"IT'S NOT WHAT YOU THINK!" You suddenly shouted, startling everyone in the room. "THIS WHOLE THING HAS BEEN A HUGE MISUNDERSTANDING, AND I CAN EXPLAIN EVERYTHING!"

Both Mom and Shelly stared at you with stupefied expressions.

Agh, crap. You just suddenly decided to scream that out loud without even coming up with a proper plan... Fuuuuck, you better hope you knew what you were doing.

"I-Is that so?" Despite the loud interruption, your mom didn't seem particularly upset. In fact, if anything, she seemed to be looking forward to what you had to say. "Well, go on then. I'm all ears."

You looked towards Shelly for any hints or advice. All she could give you was a bewildered look, almost as if she was asking What the hell are you doing?! to you.

Crap... Guess she'll be no help then...

You took a deep breath as your brain started working on maximum overdrive, the metaphorical hamster running on the wheel that represented your brain going all out by sprinting faster than all of the Olympic runners record speeds combined.

Improv skills, don't fuck up now...

"Yesterday when you walked in on us in that position was probably the world's most horrible timing in all of mankind, but I promise that it wasn't what you think, Mom. You see... Uh..." You began to trail off nervously, before a light bulb collided into the back of your head, giving you the perfect excuse and idea! "I actually found a girlfriend a few weeks ago and we've been going steady for a while now!"

Your mom furrowed her eyebrows in confusion, before giving a very confused, "Wait, wha??"

Shelly raised an eyebrow, wondering where the hell you were going with this.

"I didn't want to tell anyone since I wanted to keep our relationship a secret since I knew things would get embarrassing if you knew. But I've gotten to know this girl really well and I've been slowly growing more serious about her. Today was the day we're actually suppose to go on a date, see, and I've been really nervous about it because she and I had plans to... well, get physical with each other to show our love together." Growing an embarrassed blush at the picture you were painting for yourself, you used it as an advantage as you kept pushing forward while awkwardly scratching the back of your neck, "But... the problem is that I had absolutely no experience with girls at all. In fact, she was basically going to be my first... And I was really really nervous and scared of embarrassing myself in front of her when the time to do it finally comes." Taking a deep breath, you continued on shamefully, "So I did basically the only thing that made sense at the time, and asked for some help and advice from someone who actually had experience when it came to this stuff... Specifically, I needed a girl's perspective on the matter... And the only girl I even knew besides my own girlfriend was Shelly, soooo... I asked her for help on how the female body worked and what it looked like to prepare myself..."

Mom began to blink stupidly for a couple seconds, while Shelly slowly started to widen her eyes as she realized what you were doing. In fact, she was looking at you with huge admiration and respect right now as your lies start to develop more and more into plausibility.

"W-Wait, hold on, let me get this straight-" Mom shook her head to rearrange her thoughts, before asking, "So when you were both naked together in her room, it was actually so that Shelly could educate you on how the female body functions?"

"Yes." You nodded as seriously as you possibly could.

Mom glanced over to Shelly, only to find her nodding along with everything you said.

"B-B-But then why were you also naked? You didn't have any pants or underwear on when I saw you!" Mom suddenly pointed out.

Not wanting to have your momentum slow down, you kept hitting back with smooth lies after another, "Shelly was explaining to me the differences in men's penis shapes, and how each form had their own weaknesses and flaws. She was trying to tell me which shape I resemble the most and how I could play to my own strengths instead of focusing on making up for my weaknesses."

"But then why was she on her knees in front of you? She looked like she was about to give you oral sex!" Mom blurted out tactlessly.

With a blush, you mumbled, "Yeah, that was really bad timing. Shelly was actually trying to teach me what faces I should make if my girlfriend decided to give me head, so that I didn't make myself look creepy when she stared at me at a lower angle. When she was on her knees, she was just looking up to judge what faces I might make and was trying to guide me to looking more... cuter, I guess?"

That answer seemed to gobsmack her a bit, as she digested all the information in her head.

Finally, she decided to ask the most hardest hitting questions of all, "But why go so far with all this? Why have your sister get naked and do all this embarrassing stuff instead of just researching it through books or online videos? And why didn't either of you respond when I was calling out and asking if either of you were home?"

"Uh, well, you see- ....um...." You were suddenly left speechless, having no excuses left to counter with. The hamster wheel that was your brain seemed to have spun so fast, it burnt itself to a crisp from the friction and was now a pile of ash on the ground.

Shit. Now what, smarty pants? How were you going to out-talk your way out of this one?

Thankfully, it seemed you didn't need to, as Shelly decided to take center stage and respond with her own well-thought out lies, "I was the one who insisted, Mom."

"Whu- You?!" Mom's jaw dropped.

"Look, I didn't want John to get the wrong ideas from the wrong sources, or accidentally learn shitty advice from a cheap pick-up artist on YouTube." She explained smoothly, "Since this was John's first time, I knew he was going to be really gullible when it comes to researching this stuff. I didn't want him to embarrass himself in front of his first ever girlfriend, so instead of taking a chance, I decided to be as thorough as possible in order to teach him everything I knew about sex." Grabbing a tuff of her hair and curling it around her finger, she continued, "Sure, my methods might be considered a bit over the top depending on the person, but I believed that my way of teaching was the most effective way to possible learn everything there was to know. An explanation from a first hand perspective given by someone close to you will always tend to be more effective than a second-hand source after all." She then paused a bit, before answering the last question, "Also, we both ignored you when you were calling for us because it would have been really embarrassing if you walked in on us during the whole thing. I thought you were just going to leave if you thought no one was home, I didn't think you would just barge into my room like that without even considering my own privacy."

...

Mom had an dumb look on her face as she slowly settled herself down on her seat, her mind slowly absorbing everything we told her like a wet sponge.

You glanced at Shelly with an impressed nod, to which she returned with a cheeky smile.

After brief period of silence, Mom slowly brought a palm up against her face and dragged it down to stretch her face out. With a thoughtful sniff, she turned to you and gave you your final test, "You said you've been dating a girl for the past few weeks? Do you have any pictures of her so that I can see what she looks like?"

This must've been your mom's last attempt to see if this all a huge lie or not. Any couple in a relationship would obviously have a few photos of themselves, especially in this day and age where everyone was photogenic and sent their vanity headshots online to suck up all the bandwidth.

Luckily, you were actually prepared with this due to Tiffany's plan of taking pictures and posting them on Facebook to make Zeke jealous.

Pulling out your smart phone, your opened up your Facebook app and logged in before checking Tiffany Brian's account.

Front and center on the 'recent' page were still pictures of you and her on your rooftop lunch date, where Tiffany spent all that time and effort crafting an romantic storyline of the two of you using nothing but the pictures you've taken together.

Sorry Tiff, for using these as fake evidence to cover for my incestuous relationship... You thought solemnly.

Handing the phone over to Mom, she took the time to look through the gallery of you and Tiffany feeding each other food and acting lovey-dovey together. As each picture was swiped across the screen, the more noticeable the smile on your mother's face was.

"Tiffany Brian, huh? She looks like a real knockout..." She giggled softly.

Quietly handing the phone back to you, she started to lean back in her seat and did a big stretched as she let out a relaxed yawn.

With a small chuckle, Mom started off with a lighthearted, "Oh my god... You two have no idea how crazy-relieved I am right now."

She fell for it... Hook, line, and sinker...

"I-I seriously thought for a moment there, that you two were secretly having sex with each other behind my back this whole time!" Mom slowly starting laughing even heartier as the pressure on her heart was slowly released, "Oh man, what a crazy day this has been! I can't believe this was all just a simple misunderstanding!"

Her laugh had become infectious, as both you and Shelly couldn't help but laugh along in relief as your excuses and bluffs worked.

"You two have the most horrendous luck in all of history! Imagine if your father was home and he caught you two like that! Oh my goodness, you wouldn't even have the chance to explain a word before sending you off to military camps!" Mom laughed even harder.

But then you two stopped laughing. It wasn't really all that funny anymore...

After a while, your mom calmed down with a happy sigh. Then, she stood up with a motherly, yet stern, "Listen you two, I appreciate how close you've been getting together. But please, don't do something as silly as this again! You've both made me feel like I aged twenty years just from catching you two alone."

You and Shelly nodded along awkwardly in agreement.

"Shelly, next time, please be more tame in your teaching approach and just use a nudie magazines as examples like everyone else. I've never heard of someone doing something outlandish as getting naked just to teach your own brother on how a woman's body works. It must have been creepy and awkward for the both of you, having to stare at each other naked like that and talk about the birds and the bees."

"R-Right. Gotcha, Mom." Shelly nodded.

"And John, I hope you've been able to get a lot of worthwhile knowledge from this event." Mom turned to you with a cheerful smile, "I'm glad to see you being responsible by using that smart head of yours, and I hope you'll be practicing safe sex when the time comes for you and your lady-friend. Still, next time, get a second opinion from someone else before asking your sister for help about these kinds of things. You have to realize that your sister can be a bit crazy in all the strangest places."

"Oh believe me, I learned that the hard way..." You sighed tiredly.

"Hey, guys. I'm standing right here." Shelly muttered annoyingly.

With all that done and said for, Mom clapped her hands happily and announced, "Welp, now that this whole drama is accounted for, I need to hurry up and get to work fast!" Speedwalking back upstairs, Mom gave you a list of instructions, "I left leftover chicken in the fridge in case you haven't eaten breakfast yet! Remember not to be late for school! Shelly, go give John one of your spare condoms in case he gets lucky tonight! John, make sure you treat her right! Remember not to let your love life get in the way with your school work though!"

The morning went by as normal as it always had been after that.

You all ate together in relative peace and silence, and then Mom left early to go to work, trusting Shelly to take you to school on time in her car.

The both of you stood by the window, watching your Mom pull out into the driveway and headed off out of site.

When she finally left, the two of you gave a huge sigh of relief.

You were so dog-gone tired, you practically collapsed right on top of the sofa.

"I can't believe we managed to get away with that." You muttered in astonishment.

Holy shit, how the hell were you able to pull that off? You were pretty much the silver-tongued devil during that whole exchange. Who knew you had a knack for improv?

Shelly wasn't half bad either, managing to pick up your slack when you dropped it and smoothly continue your impromptu story from there without help.

Speaking off, Shelly still stood by the window for some reason as she kept watch of the front driveway.

"Shells? You okay?" You asked curiously.

When it was clear that Mom had completely left and had no chance of coming back, Shelly dropped the window curtains and gave you a familiarly dreadful impish smile.

Aaaah, god dammit...

Swaying her hips side to side as she walked up to you, she seductively crouched down to your level and gave you a smoldering look before leaning in closer.

This would be your only warning before Shelly pounced on your lips like a rabid animal, penetrating your defenses with her tongue and assaulting your base with no hesitation.

Despite yourself, you couldn't find the energy to stop her or pull yourself away. For once, you decided to just go with the flow and let her kiss you as much as she wanted.

After a full minute of nothing but sucking face, she finally pulled away with a pop, before saying, "You were so cool back there, coming up with all those lies without even fumbling. Holy shit, bro- I never thought you could pull out so many convincing lies after another! It was like you've done this a million times before, or something! Seriously, how did you do it?"

You felt uncomfortable with this line of questioning, not finding it flattering at all at how she was basically calling you a master liar and manipulator. Turning away with a frown, you said, "I have honestly no idea. It all just came to me on the spot."

Pulling your face towards her, Shelly bit her lip before whispering, "Well, let me tell you then... I'm super horny right now after seeing you pool the wool over Mom's face like that. I really thought today was going to be our last day together, you know. Now that you've managed to save our butts though, I'm thinking I gotta give you a special and appropriate reward for all you pulled off."

"Seriously, Sis?" You sighed in annoyance, "We literally just danced near the edge of the Reaper's scythe a second ago, and now you want us to keep going? You haven't learned your lesson at all, did you?"

"Probably not, no." Shelly shrugged playfully, before moving to unzip your pants.

You couldn't help but hiss from the cold air hitting your junk as it stood completely erect.

"Ooh, look at that! Looks like I'm not the only one who got aroused from the brush of ****." Shelly coo'ed while licking her lips.

You gotta admit it, yeah. A part of you actually got super turned on from managing to survive this whole ordeal without a scratch.

What that says about you, you really didn't want to know. If anything, you're more disappointed in yourself for still letting your lust get the better of you.

After everything that happened though, you might as well enjoy it...

"Fine..." You mumbled, glancing away as you leaned back.

"No arguments or excuses this time?" Shelly seemed surprised at this, "Really?"

"At this point, after everything you've done to get us into this mess to begin with, I deserve to rest a bit, okay?" You grumbled halfheartedly.

Shelly giggled, "No complaints here. Don't mind if I dooo~!"

With that, Shelly started digging in with another blowjob. She used her two hands to jack you off as she slowly licked the head of your mushroom tip, getting the whole thing wet as her drool traveled downwards.

"We have to go to school soon, remember. Try to make it quick, please..." You reminded her.

"In that case..."

Shelly went ahead to skip the teasing and immediately went into the foreplay, engulfing your entire cock smoothly down her throat.

Your toes clenched together as you moaned in pleasure, enjoying the warm tightness from her deepthroat skills.

Shelly continued to engorge herself on your cock as she began bobbing her head, pulling her lips to reach all the way to your tip before pushing herself down to reach the back of her throat as her nose touched your pelvis. She slurped and moan all the while, holding her hands on your thighs and enjoying herself as she fucked your cock with her mouth.

Jesus christ, for some reason, today's blowjob seemed way more... intense than all the other previous ones combined. You couldn't help but wonder if it had to do with the fact that you were much more accepting towards your sister now when it comes to sexual stuff?

The way her tongue moved all across your base, while her lips covered the whole shaft, and the way her suction skills just squeezed your cock in her mouth-

Fuck, you seriously love her blowjobs.

Knowing that you both had school to attend to, Shelly gradually picked up the pace of her sucking and bobbing techniques, her head bouncing faster and faster.

Your hips instinctively responded in kind, as you began to thrust forward to match with her rhythm.

Shelly didn't seem to like that for some reason, as she suddenly stopped and put pressure down on your legs.

"Sorry little bro, but today, I'm doing all the work. You sit back, relax your body, and cum until you're absolutely drained." Shelly winked, before quickly resuming her suckjob.

You didn't appreciate her forcing to hand all of your control over to her, but you listened to her anyway just to be able concentrate on the pleasure.

Your sister began to go faster and faster in her bobbing speed, making you squirm in your seat as you flinched and moan.

You couldn't help but clench your hands onto the sofa as her blowjob became more intense, your knuckles whitening from the pressure as you shuddered and turned.

Shelly was as unrelenting as always when it came to her blowjob skills. Today would seemingly be no different.

It didn't take long before your cock met it's reaching point as Shelly slurped and bobbed away to her heart's content.

"Cumming...!" You hoarsely whispered. "Cumming!"

Shelly took that as her cue to go even faster now, showing off her skills even further as she went down on you like a jackhammer. The suction of her mouth became even tighter than before, meaning Shelly had no plans to break away anytime soon.

The pressure was too much and finally released, making you groan as you shoot out your cum inside your sister's mouth. Spurt after spurt, rope after rope, all being slowly swallowed without even so much as a cough or a hiccup.

Shelly once again proved to be the master blowjob queen, taking in your entire load without spilling a drop.

When you finally emptied yourself, Shelly pulled away with a loud slurp before opening her mouth to show off that, yes indeed, she did swallow it all.

As you gasped for breath to regain your stamina, Shelly giggled at you with a smug smile.

"What?" You asked.

"I don't know who this Tiffany Brian is, but I bet you a million bucks she'll never give you head as good as I do." She bragged-slash-flirted.

You rolled your eyes at her claim, but said nothing in return. Not like you could prove her wrong anyway.

And so, your school life resumes as normal.