A Sudden Blowjob*

You're dragged into the darkness of your sister's room and feel yourself slide onto cold tile floors. Your sister reaches down as you try to get a read on your surroundings pins your head to the floor with a hand. Then a cold poke is felt at the side of your neck.

Ameko, your older sister, is ontop of you, straddling you. Her legs and thighs pin you down while one of her arm stops you from squirming. The other simply holds a syringe up to your neck. You couldn't see well but with the little light that was in this room all you could make out was your sister's happy blushing smile in the dark. Her long messy locks of hair outlines her figure menacingly.

You stare at her for a second through her fingers before....she drops her smile and looks at you with a twinkle of curiosity.

"Oh?~....intriguing." Ameko says as she lifts the syringe away from you.

"W-What the hell!?" You say as you lay there in her hold, you try pushing against her body but you're locked down tightly even with your strength. Was your sister always this strong? She's no athlete nor does she look capable of holding you down.

Your breaths are slow and steady as she then settles herself down to sit further onto you. Her warm crotch and generous thighs touch your hard member. Her chest comes down onto yours and you feel her soft breasts smush against you. You didn't even need to look. Even in this darkness where you can only see her outline made by the blinking electronics in the room you can tell by the touch of her body against you that....she's completely naked except for what feels like a white lab coat she has on. Her hand then slowly retracts from your face.

"Impenetrable....or maybe just hard skin huh~? Fascinating....Guess there's no need for this then. I'll do it while you're awake~...."

Ameko says as she chucks the syringe into the dark room. It's definitely a safety hazard. Her hands then reaches up to grab your face and begins to sloppily kiss you as she brings her lips to yours. You make out her beautiful face and feel her comically large round nerd glasses hit you as she kisses.

You don't know what the hell is going on but your sister who you've crushed on as equally hard as your mother for years is sitting on top of you and giving the wettest and warmest tongue in the world. Her curly locks fall down around her shoulder and back giving her a maidenly look despite her lewd nature.

Her tongue is sloppily lubricated with saliva and the way she kisses you is very....greedy. Her tongue does what you did to Amelia. Just invading your mouth and swirling around. She even began to suck on your tongue and lips, peeling them away hungrily. You can't tell if she's experienced or inexperienced but it's clear she desperately WANTS to have this kiss. You enjoy it nonetheless as she takes charge. All thoughts of any taboo flee from your mind.

Your hands slowly slide up her thighs as she becomes occupied with your mouth. Just feeling her skin and running your hands up and down them slowly trying to not alert her too much. But after a small period of time you got more and more bold. Your fingers traced her legs to her ass....and she has an ass alright. It's thick but not too big, just the right amount of meat on her that you're able to grab a handful of and bounce. A perfect heart shaped ass. You picture her in your mind as your eyes try to gleam more of her figure. Your member just hardens and you pitch a good tent up at her crotch.

Ameko moves down your face and begins to plant kisses along your chin down to your neck and then collarbone. Her warm breath that hits you makes you hold her more as your hands move onto her womanly hips, sliding under her lab coat. You caress them with your hands as she moves further and further down. Soon Ameko's tits slides over your tent and all you hear is a slight moaning and the rustling of her lab coat....then a pair of hands pull down your shorts and free your dick.

You let out a small moan as well and look down at her, brows furrowed with the feeling of her saliva still loose on your lip. There is a familiar but different sensation as something wet catches the tip of your dick. Your eyes have finally adjusted to the dark and you stare down your pale older sister in-between your legs, her sexy lips that was just kissing you is now wrapped down a good length of your manhood as she just takes it in without question.

You feel like you are flying right now. Your sister's blowjob is....very distinctly different from Amelia's. Unlike Amelia's small mouth and tight cute lips, Ameko consumes you like a snake. Her jaws are wide open as she slowly performs a magic trick, slathering you in her overflowing saliva and making your dick disappear. You feel the soft squishy insides of her mouth clamp down on you without any rigid hesitation and just keeps going.

Your tip travels to the back of her mouth and you feel it slide down her throat. You stare in amazement and shock, for the first time that you can remember you see the lips of a girl up against your base. You're squeezed tightly and carefully by her throat muscles, twitching there and feeling like a piece of meat being consumed by her.

"Mmmm~...." She moans into your dick and her throat vibrates. You hold on the best you can, simultaneously wanting Ameko to drink you down like this and wanting to prolonged this feeling of being blown by her.

Ameko has no shame it seems as you and her make eye contact in the dark and she just continues without any care. Her head bobs up and down on you with lewd sounds coming from the suction of her sloppy blowjob. She instead just lifts her eyebrows and attempts a smile. Is she teasing you? Well, you can't complain. Ever since you were young you took to her as inspiration and a role model. Naturally you liked her as she's the girl you spent most of your time with as a kid. She's grown into a fine beauty any man would be lucky to be with. To boot you can definitely see your mom's features in her which makes her that much more alluring.

"Ah~....shit. Ameko, your mouth is amazing."

You lift a hand to pat her head. You wonder why all of a sudden she had taken an interest in you. You don't remember her being interested in anything relating to sex at all aside from her projects. You even thought she was asexual at one point as she had no interest or sexual attraction to anyone. The closest thing was when you two showered together and she would try and touch your penis because she thought it was funny looking as a kid.

"Mmm~.....ahurmm~...."

She moans some more as she looks up at you with a very lewd look on her face.

"Kurmm~...."

"Agh~....What?" You swipe back a lock of her bangs.

"....Kurmmmm~."

Is she trying to say....cum?

"Ah~ just a bit....more please." You say and push your hip off the ground into her.

Then suddenly her hands grab both of your own and put them onto her head. Your fingers naturally find their own place in her locks of messy hair. You can't resist....she's asking you to cum in her mouth isn't she? To do as you please? You gulp.

Knowing her, this is probably an experiment or test in the long run. But hell, you're going to enjoy it. The fact that she is your sister....your blood sister is long gone from your mind already and it seems she doesn't care either.

Ameko at this moment is simply a beautiful woman on top of you doing something fantastically lewd and you're not going to pass this up.

"Ah~....hah-....alright. But you owe me an explanation."

You say to her before you lift her face up your manhood to the halfway point and pull her down all the way again. You try not to **** her down too hard but a realization hits you and you become even more hard and aroused. Your sister doesn't have a gag reflex as she squeezes her lips tightly down at your base. Her lips stretch as you push and pull again, face fucking her onto you.

You continue this heavenly motion for another minute. Such a lewd person your sister is, allowing her brother to do this to her. You then feel a build up inside you. A tingle of that good feeling that makes your toes curl and your thighs tense. Your dick strains to harden even more feeling the incoming climax.

"Ah~....I'm close....super- ahh~...close!"

"MMMMMMM~...."

Your sister moans again loudly with you inside her. This finally tips you over the edge as the vibrations of her voice travel through your dick and into your saliva covered balls. You grab her hair tightly and push her deep into your crotch. Her lips slide all the way down as far as it can go. Her nose and glasses hits your pelvis as you begin to unleash yourself freely inside her throat. Her slippery throat walls squeezes down on you with conviction.

If what you gave to Amelia in that bathroom was a river then here it was a torrent. You cum rapidly with constant sprays of your hot seed into her throat and straight into her stomach. She doesn't fight it but instead encourages you to do so as you feel her throat pulsate and gulp your baby batter down. You keep her pressed up against you for a while....a long while as you just ride out the feelings of your older sister continue to suck the rest out through your urethra.

After, Ameko starts to pull herself off of you. Her lips create a vacuum that begins to suck your softening and sensitive manhood of any liquid on it. You just watch her as she completes her magic trick, making your dick reappear. Her hands hold onto your base as her mouth finally gets to the top. You can feel her lips wrapped around the head of your sensitive cock before she lets it go with an audible 'pop'. It flops back onto your stomach defeated

Ameko effectively drained you. She then swallows hard, you hear an audible gulp and she opens her mouth towards your direction to show you in the dark. There is the loud smacking of her lips as she does as if she had just finished a meal.

"Mmmmm~....tastes better when harvested directly~...."

Her words come out very sexy as you watch her wipe a dribble of cum on her lips with a finger and licks it up with her tongue. Her other hand reaches up and fixes her glasses which catches the nearby light and glares white for a second. Her body leans upward, her well endowed tits are out in the open, bouncing up beautifully.

"Shucks~....I've accidentally swallowed the sample."

She smiles down at you teasingly. Your heart skips a beat and your dick twitches, you want to do more with her. No, you need to.

You let out a final breath of satisfaction as you lean up to prop yourself up with your elbows. Your sister starts to stand and you just look up at her trying to see more of her body....

If Kara is a vampire then Ameko is surely a succubus.