Is it considered cheating if it's with your sister?

By the time you reached the doorway, you saw your sister's clothes strewn about everywhere, littered all over the floor like a trail leading to treasure.

Well, that was fast.

With a cautious step, you slowly followed the trail that was leading upstairs while picking up her mess along the way. The very last article of clothing was a pair of string panties that pointed to her room. You hesitated to pick it up, as the damn thing was completely soaking wet and smelled like pure female sex. Still, you manned up and took a hold of it anyway.

Opening the door to her room, you saw Shelly vigorously fingering herself as her computer was playing some sort of porno involving twin lesbians, one eating the other one out while the other one loudly moaned in her speakers.

When you walked in and shut the door behind you. Shelly then turned and gasped in mock surprise, "Oh! Dearest little brother! You've caught me doing something naughty! How embarassingly lewd~!"

You blinked.

Is she serious right now?

With half-lidded eyes, she rubbed her juices all over her big breasts, which was only covered by a small and tight white t-shirt, way too small for any normal adult, which was slowly becoming see-through the more your sister rubbed her hands over herself.

For some reason, this whole situation, with you walking in on your sister on the computer, in that exact t-shirt...

Deja-vu, for reals.

"Oh no~, I hope you don't see the outline of my tits from this angle!" She said in a swoon, doing her best to puff her breasts out.

You rolled your eyes at Shelly's bad porn acting. Well, I mean, you wanted to at least. Your eyes were actually magnetized towards her body the moment you laid your eyes on her, so you couldn't look away even if you wanted to.

Fuck, your brain was pathetically weak against your male hormones.

Your eyes roamed her entire body as you stepped in front of her, your eyes lingering towards her giant bozongas.

She noticed your look and playfully pushed her puppies together to entice you further. Rubbing her nipples until they were stiff, she teased, "Mmm, I guess it can't be helped! A girl has to help her brother's cock, after all."

Man, you wished Bella had a pair of knockers as big as Shelly's. Even though her body was practically perfect as it was, it definitely wouldn't hurt if she had DD cups like your sister.

No, wait, fuck, what were you thinking? Down boy!

Shaking your head clear, you **** yourself to look away. "Wait, Shelly, before we do anything, I needed to tell you something that happened these past few-"

Shelly stood up from her chair and pushed you down on her bed, before she took a hold of your pants and unzipped it. Pulling it down to reveal your stiff cock, she roughly stroked it with a sense of impatient urgency.

You gasped at the interruption, "Shelly! Come on, I'm serious! I need to tell you-"

Shelly pinched your lips shut as she stood up and looked straight in your eyes, her other hand still jacking you off. "John, I'm serious too. It's been three days. I haven't gotten myself off ever since you left. I've been annoyingly horny these past few days, to the point where it's starting to drive me crazy. I went out to the mall just to buy this specific child-sized white t-shirt and prepared this whole scenario once you got back home. Just let me have at least ten minutes with your cock in my throat to calm me down, please?" Letting your lips go, she sat back down and took a firm hold on your legs, "Whatever you have to tell me, it can wait until after you blow a load, okay?"

...

Well, when she puts it like that, it was kind of hard to argue...

Seriously, what was up with girls always interrupting you from telling them the truth about having relationships with other girls?

Before you could speak up again, Shelly already engulfed your entire cock down her throat in one swoop, moaning in ecstasy like a **** addict finally getting her fix after a two month withdrawal period.

You instinctively held your hands on top of her head like a kneejerk reaction, "HOH FUCK, THAT ACTUALLY SORT OF HURTS NOW."

But it felt so good too...

For a moment, Shelly started mindlessly bobbing her head to forcefully throatfuck your cock to oblivion, moaning like a dog in heat.

But then she suddenly slowed down.

Then she suddenly stopped.

She blinked for a moment, before inquisitively sucking on your cock like a piece of candy.

"Shelly?" You asked, wondering why she suddenly stopped.

She seemed to ignore you, too busy licking your cockhead cautiously as if she couldn't make out what it was.

You suddenly got a bad feeling about this.

Like a flip of a switch, gone was Shelly's fervent sex-crazy personality. Letting your cock go, she stood up and looked down on you with a disappointed face.

"You've been seeing another girl, haven't you?"

"You could tell just from taste?" You asked incredulously.

"Dude, your dick tastes like lavender and spring soap." She pointed out. "And it wasn't even a subtle taste either! It's like you dipped your whole dick in a tub of scented soap for literally three days straight without pulling out to dry."

Well, that's a colorful analogy, if not exactly incorrect...

You looked away embarrassingly, having no idea what to say.

With a huff, she sat down in her computer chair and folded her arms. "You said you had something important to tell me?" She reminded in an annoyed tone.

She seemed upset.

"You're not going to finish your blowjob?" You asked.

"Something tells me that I'm not going to be in the mood." She said dismissively.

Right... Hoo boy...

You're not exactly sure where to start, to be honest. Might as well go at it directly.

"I've been seeing someone for the past few days. We're in a relationship now. That's what I've been trying to tell you."

Shelly looked down in thought, soaking in the news.

You figured that Shelly might take this news sourly. You had no idea what kind of relationship you had with your sister yourself, but you were sure that even Shelly would probably be the type to get jealous.

Then, she looked up hesitantly and asked, "So you two had sex?"

You sighed, "Yeah-"

"And I'm not talking about some casual blowjob or a quick handjob here. I'm talking penis to vagina straight fuck intercourse. Like, real shit." She clarified.

You blinked confusingly for a moment. Why is that the important question to ask here?

You nodded, "Yeah. We did."

"So just to be one hundred percent clear... You're not a virgin anymore. Like, you got no cherry inside you to pop anymore." She asked with a straight face.

"Yes. I don't-..." You paused, "Wait, isn't popping cherries a euphemism for girls losing their virginity? Not guys?"

"Dude, are you still a virgin?! Yes or no?!" She impatiently asked.

"No!" You hastily clarified, "I don't have my virginity anymore!"

Where the hell is this conversation going, exactly?

Shelly frowned as she looked away in thought. Then she asked, "You sure it's not a fluke? Cuz, like, if you were just rubbing your junk up against her clit, that still technically doesn't-"

"Shelly, I don't know what else to say about this. I'm not a virgin anymore." You said with finality.

Shelly spun around in her chair away from you, loudly groaning in agony. "Goddamnit! I can't believe you... How could you just walk out here and straight up give your virginity to another girl...?"

You sighed, before moving to comfort her, "Sis..."

"WHEN YOU COULD'VE GIVEN IT TO ME!"

Wat.

She suddenly spun around and lamented, "Or at the very least, you could have called me to invite me over! Any girl who's kinky enough to fuck on the first date should be chill with a threesome, I think... Or maybe just called me first so that I can hear the sounds over the phone and masturbate over it! I should have been there at the very least!"

Okay, you are now officially lost again. You have no idea how to read your sister.

"So, wait..." You interrupted, "You're not upset that I'm seeing another girl?"

"What?" She furrowed her brows and looked at you as if you were the one in this conversation that didn't make sense, "No, I don't care about that! I'm actually sort of proud you managed to bang a girl other than me- But that's not important right now! You lost your virginity without telling me first! What kind of insensitive brother are you that you wouldn't even consider telling your sister?! I mean, I get that you probably weren't open to the idea of having me taking your virginity since I'm your sister, but the least you could do was ask if I wanted to watch or join in!"

...

...

...

You need to sit down and process things in your head. Maybe even reevaluate your life a bit.

This has gone on for way too long and has gotten far too weird.

Are you in some sort of alternate universe where you can have sex with anyone, and nobody would care that you might be cheating on multiple girls?

What the fuck is wrong with these girls in your life?

What the fuck is wrong with you?

Are you the only sane person here, or is everyone else sane and maybe you're the batshit crazy one?

You shook your heads from these thoughts and decided to just continue what you were trying to ask her, "Look, sis, now that I'm in a relationship with a girl, can you maybe stop acting flirty and weird when we're outside the house? I don't want her to accidentally see my own sister rubbing her boobs against me or something, and then get the wrong idea."

"Psh, lame!" Shelly huffed annoyingly, "What if she's the sort of girl that thinks **** is hot? She might be totally okay with it, you never-"

"Shelly!" You warned.

She sighed dramatically, "Fine fine, I get it. No more flirting or teasing in public. Make life boring and less thrilling too, why don't you?"

You sighed in relief, "Thank you... That's all I needed to tell you."

Before you could get up and leave, Shelly stomped your ass back on her bed and glared at you. "Exactly where did you think you're going?"

"My room...?" You said uncertainly.

"Uh, not without blowing a load down my throat, you're not! In case you've forgotten, you left me alone at home for two days while you were out busy slapping your salami in another girl's sandwich!"

...

Slapping your salami? The hell does she come up with these euphemisms?

Without being able to get another word out, your sister jumped on top of you and straddled herself on your hips, effectively locking you down on the bed.

She took her wet and sweaty undersized t-shirt off and flung it behind her, before looking down on you with a smoldering expression. "You better saved some spunk leftover for me, or I swear I'll get mad."

Although your cock had softened up from the conversation before, it got rock solid hard again in less than a minute with Shelly on top of you.

Your cock accidentally squished against Shelly's cunt, making her moan in surprise and you squirming in place.

This was the first time you both ever had your most private parts touch together.

Shelly looked down, contemplative and curious. She looked like she wouldn't mind if this lead to something more serious than a blowjob.

But you... You don't...

Shelly glanced at you for a moment, as if asking for your permission first.

You were conflicted about it, honestly. And maybe even a bit grossed out at what might happen. Turned on, yeah, but disturbed too...

No. No, she was your sister. This was wrong. Fooling around was one thing, but something like this isn't...

You shook your head, "Please, don't."

Shelly gave you a disappointed look, "Does it really matter? You already lost your virginity..."

"That's not the point. You're still my sister..."

She was really tempted to do it. You can just see it in her eyes that she really wanted to ignore you and just go for it. Either because she wanted to feel what it was like, or maybe she thought she could push you into doing it if she tried hard enough.

Thankfully, all she did was sigh and mumbled, "Such a prude," before readjusting to a sixty-nine position.

Phew... That was close... You're not sure what you would've done if she...

Maybe one day. When you're emotionally and personally prepared for it.

The next few hours of the day was spent with your face in your sister's vagina, and your dick in her throat. Shelly was caught surprised by the fact that you've managed to make her cum more than she could make you cum, unaware that the sex you've been having with Bella was more than nonstop for a majority of the past few days. In all honesty, this was putting a real strain on your cock. It was getting more and more painful each time she sucked. You wouldn't be surprised if your balls were completely empty at this point. That would at least explain why the only time you came in her mouth, there was little more than a small drip of semen.

It was on your seventh round that Shelly started becoming annoyed and pulled her butt away from you for a more traditional "on her knees" position.

You sat there on the edge of her bed, watching her violently bob up and down your cock, as she always does, but this time with more determination than normal. Wiping the residue of her juices off of your face with some tissues, you told her, "Shelly, I don't mind that you're orgasming more than me. You really don't have to push yourself-"

"MMM!" Shelly popped your cock out and angrily said, "No! It's not fair! You've only been gone a few days, there's no way my technique has gotten sloppy since then! You used to cum out enough to fill buckets everytime I did this, so what am I doing differently now?!"

"Sis, trust me, it's not your technique. It still feels as good as the first time you did this." You tried to reassure her. "I've just been tired lately."

"Bullshit." Shelly said simply, furiously jacking your cock off, "You're a hormonal teenage boy still in high-school. You should be at that time in your life where you could cum fifty times a day and still be unsatisfied!"

"And where the hell did you based that fact on?" You asked incredulously.

"Internet research." She answered matter of factly, going down to inhale your balls.

You twitch and grunted from the pleasure, but still couldn't cum. "Right... Internet." You rolled your eyes, "Maybe I'm just not like other hormonal teenage high school boys. Maybe I'm not the type that can cum buckets every single day."

"Mmm~ Oh, you will be once I'm done with you!" She said, taking your words as a challenge. Studying your penis, she mumbled to herself, "Maybe you're getting desensitized to the pacing..."

Like the stubborn idiot that she was, she's not listening to you. At this point, you feel like it's better to just give up and let her do what she wants.

At that moment, the worst thing that could possibly happen happened.

You heard someone open the front door downstairs, and a familiar voice called out. "Shelly? I'm home!"

"Oh cripes." You muttered. "C'mon Shelly, let's save this for next time." You move to stand up and put your pants back on, only for Shelly to block your path and push you down again.

You looked at her with alarm as she smiled devilishly.

"Shelly, what are you doing?"

She didn't say a single word, instead only going back down on you and slurping your cock slowly and methodically.

You try to get up again, but she had a tight firm grip on your hip. Despite your efforts, she was still stronger than you, after all these years.

Your mom called out again, "Shelly? Are you there? Did you pick up John from school, like I asked?"

You can hear her footsteps getting closer, almost getting near the stairs.

"Shelly, this isn't funny. Let me go, we're about to get caught!" You whispered-yelled at her.

"Looks like you better cum then, before Mom catches us. I'm not getting off of you until I get my fill." She told you with an evil smirk.

She's bluffing.

She's bluffing, right?

Shelly, completely serious, sucked the tip of your cock in mouth and refused to move or let go of you.

Oh my god. She's insane.

She's literally insane.

"Shelly? Are you asleep? Honey, it's the still the middle of the day, don't sleep too long or else you'll be staying up all night."

Your mom's footsteps sounded closer as she went up the stairs.

You looked down in terror as Shelly still wouldn't relinquish her hold on you, staying attached like a leech on your cock.

For fuck's sake, how do you even manage to get into these sorts of situations?

Welp, it looks like you're about to have your whole entire life ruined within the next 2 minutes unless you somehow muster up the energy and libido to **** yourself to orgasm down your own sister's throat. Just a normal day in the life of John Doe, THE UNIVERSE'S FAVORITE BUTTMONKEY CHEWTOY.

"Oh, I really hope you **** to **** on this." You muttered angrily.

You didn't really mean it, you were just pissed at her. Despite how morbid the idea was though, Shelly actually seemed excited by the prospect like the freak she was.

With a new sense of urgency, you grabbed the back of her head and roughly jackhammered your cock down her throat.

"MM-MM-MM-MM-MM~!"

In and out like a machine, you did your best to use her head like a fleshlight and **** yourself to cum as soon as possible. Knowing that Shelly basically had absolutely no limits when it came to being rough, you roughly fucked her mouth without a single care to her wellbeing, trusting that she's tough enough to withstand it without any longlasting damage.

The pleasure that came from this was both amazing, yet incredibly painful. You felt like a dried up hose that's **** to get that last spurt out through any means necessary.

You then realized how much of a perverted freak you are yourself when the sounds of your mom's footsteps getting nearer actually managed to excite you further.

The idea of your secret incestuous relationship getting exposed by your mother somehow fueled your passion, making your cock tremble in Shelly's throat. The painful stress from overuse of your cock seemed to dissipate and you actually felt really close to letting loose a big one again as if this was the first time you orgasmed since months.

The door to Shelly's room was knocked, and your mom called out, "Shelly? Are you up? Don't make me come in there to wake you, missy!"

You **** your mouth shut, doing your best to make your breathing and grunts as silent as possible. You were almost there...!

"Shelly?"

Oh fuck, please don't come in! You just need five more seconds! C'mon!

Uuuuuggggh...

With one last final thrust, you finally managed to burst out a big one down your sister's throat. Shelly happily and dutifully gulped it all down with expert dexterity, not once **** or gagging. You covered your mouth and nose, **** not to make a single sound so that it doesn't tip your mom off that you were in Shelly's room.

Shelly continued sucking you off as you came, continuously forcing you to pour into her throat like a faucet sink. You felt like your sanity was slowly slipping away as she made you spurt another batch of cum.

In your orgasmic haze, you almost nearly forgot that your mom was just outside this room, and she was about to come in at any second.

You froze when you heard her turn the doorknob, your blood suddenly running cold, and your lifespan getting the last twenty years shaved off with a cold-cut razer.

...

_"Oh whatever," You heard Mom huff, before stepping away. "That girl is always fooling around and lazing about all the time. It's a wonder how she even gets passing grades."_

Her footsteps began fading away in the background as she went downstairs.

...

...

...

You slump back, heavily breathing as your heart pumped 3 million beats per second.

What the fuuuuuuuuck.

WHAT THE FUUUUUUUUUUUUUUUCK-

With a wet slosh, Shelly pulled your dick out of her throat and triumphantly gloated "Ha! I knew I still haven't lost my touch."

"I'm going to die because of you someday, sis. You are going to drive me up the wall, and one day, I'm going to snap like a KitKat bar." You gasped out slowly.

"Glad it felt good for you too~!" She chuckled teasingly, rubbing her boobs against your dick.

"Are you literally insane? Like, you do realize that we were nearly _this _close to being caught by Mom, right?" You pinched your fingers for emphasis, "What in the world is wrong with you?!"

"Relax, John." She smiled casually, playing around with your limp noodle. "I totally knew she wouldn't come in. This is basically a routine for us at this point. I sleep in early, Mom tries to call for me, I pretend to stay asleep, Mom gives up and goes away."

"Shelly, I was about to die from a heart attack." You deadpanned. "You couldn't have told me beforehand?'

"Well, I mean, I could have." She shrugged, kissing your tip, "But then you wouldn't panic and fuck my throat like it was the end of the world, now wouldn't you?"

This freaking girl...

"You're a demon, Shelly." You told her, "A dangerous Succubus demon that's going to ruin my life one day."

"I fully acknowledge the part about me being a Succubus~" She winked.

Oh god, you felt like you could pass out at any moment.

You better clean up and get out of here before your mom catches wind.

"C'mon Shelly, that's the last batch out of me for today. Help me clean up the mess we made before-"

The door suddenly opens up, with your mom barging in with a laundry basket, "I might as well clean up your mess while I still have the ch-aaAaance....."

Everyone froze in shock.

Like deers in the headlights, you and your sister stood absolutely still, your blood running cold, and both of your lifespans being cut short by about fifty years with a samurai blade.

Your mom had a dumbfounded expression as she looked on at the scene of your naked sister on her knees, playing with your limp lifeless wet cock in her chest.

Welp, I'm dead.

The Bad Ending

Credits

Director - TheNextGamer

Editor - TheNextGamer

Producer - TheNextGamer

Al Capone as John Doe

The Green Goblin as Shelly Doe

Guy We Kidnapped off the Streets - Damn Boi guy #3

Zoidberg - The True Evil Villain of the Entire Storyline

Leonardo Dicaprio - Bella's Inner Demon

"I... Uh... Um..." Mom looked between the two of you in shock, unable to really comprehend the situation. You almost expect her to faint right on the spot, but to your surprise, she instead muttered, "Dinner will be ready soon. We're having drumsticks and mashed potatoes," before slamming the door shut and quickly sprinting down the stairs. Then you heard another door slam, which was probably her escaping to her own room.

...

"That... uh... that didn't just happen, did it?" Your sister laughed nervously in denial, her smooth hair suddenly looking frazzled and messy from stress.