Breaking Laura

Later that night, after the homecoming festivities are over, everyone heads back to their rooms to get some sleep. You sit on your bed and think about who will be first. With a smile you decide on your step-sister Laura, you grab a Zeta organism and leave your room.
You sneak upstairs to Laura's room and open the door slowly. Laura was the "sporty" one of the lot and was always very nice and kind to you. She was 3 years older than you and you remember lusting after her when you were younger. You look through the door and what you see surprises the hell out of you. Laura is laying naked on her bed with a pink colored dildo sliding in and out of her pussy. Your eyes commit her body to memory; very strong legs with perfect definition, the slight outline of her abs along her stomach not a speck of fat to be found, B cup sized breasts which hold your biggest surprise as you notice that there were bolts through her very perky nipples. You stand there and watch her play with herself when she suddenly moans out your name followed by pleas to be fucked. You grin and put the Zeta Organism away, "Won't need that for this one" you think to yourself.

   You shed your clothes and walk into the room, letting your already hard cock show proudly.  Laura jumps up and tries to cover herself and you move to her bed, ripping the covers off.  "JOHN!  What are you--" she exclaims before you move over and cover her mouth.  "Sssssh!  Not so loud!" you say before continuing, moving a hand along her tight stomach and up to one of her nipples, pinching it playfully.  She moans a little and tries to push you away, but luckily you had her beat on upper body strength.  You pin her arms back above her head with one arm as you straddle her torso, placing your cock along her chin.  "C'mon sis, whats the big deal?  You were just fantasizing about this, now its here for you..." you reach back with your free hand and rub her pussy slowly.  "But it isnt.... it isnt... right.." she whimpers, you grin knowing she is at her limit.  You reach back and grab the dildo she was playing with and slides it back in slowly.  "Right?  Says who?  Mom?  Lisa?  Jessica?  Who are they to tell you anything?  They are just jealous I think.."  She looks at you, that struck a chord with her.  "Jealous?  Of.. me?"  she asks meekly.  You nod and speed up your thrusts with the dildo, "Yeah, I mean you are smart, kind, athletic, and damn sexy...  They are below you..  You should just do what you want...  I'll help you... " 
   You slide the dildo in deep then remove your hand, moving your hips perpendicular to her mouth and use your free hand to guide your cock, tracing it along her lips slowly.  She moans softly and opens up her mouth slightly, you take this chance to push your head past her lips and deep into her throat.  Whimpering, she accepts your length eagerly and taps your thigh, gesturing for you to lay on your back.  Rolling over, you tell her "Place your sweet ass up here" pointing towards your face.  She blushes and nods, she turns and straddles her hips above your face and leans over, hungrily enveloping your manhood. 
 You groan a bit as her mouth feels like fire around your dick.  You reach up and grab the dildo, still firmly implanted in her pussy and you start to thrust it in and out rapidly, all the while your tongue slides out and swirls around clit.  She sits up, still keeping a hand on your shaft, stroking it rapidly as she cries out in pleasure.  You pull out the dildo and push her hips down your body and rest your head between her pussy's lips.  "Shall we complete this?" you ask.  She shakes her head "N-No!  We can't!  We won't!" she says defiantly.  You grin and say "Why?  You want it.. I can feel how wet you are...  Well, allow me to remove your doubt..." With that you thrust all 8 inches deep into her and hold her hips against you.  She writhes with pleasure but still tries to refuse "No!  No this isn't right!  I, i mean we... "  You pull her body back against yours and reach up, twisting her nipples slightly before whispering "Your body is more honest than you are...  Your hips have been grinding me since I entered you"  It was true, she had begun to grind herself against you hard since the moment you penetrated her.  "Who are you trying to fool?  Just fuck me sis..." you say to her in a firm voice.  The final barrier had been broken.  Laura objects no more.  
 You take a firm hold of her hips and use them to slam her harder and harder against you.  She tries to stiffle her moans out of fear of the others hearing her.  "Jesus sis, your body feels incredible!!!  Hey, get on all fours for me"  you pull out and Laura gets into position.  You slide off the bed and grab your pants, tossing them onto the bed before moving behind her, your cock sliding in now like a hot knife through butter.  
   You notice a tear rolling down her cheek as you plow yourself in and out of her.  "Sis doesn't it feel good?" you ask.  She whimpers "yes... it feels so good, but it just is wrong, I'm your big sister!  We shouldn't do this"  You lean over, pressing yourself against her back and whispers "What if I could take away that feeling of guilt?  Imagine the pleasure and enjoyment we could have...  If it were possible, would you want that?" She nods slowly and you grin "Ill make it so sis..." you reach over and pull out the Zeta Organism container from your pants and you take it out, setting it at the entrance to her ear it crawls in quickly.  "You will no longer allow yourself to be regulated by the morals of other people, if I tell you its ok, than it is.  Be free of shame and embarassment" you command.  
  The second you finish, she starts to buck wildly against you, enjoying it fully, free of the fetters of society.  He give out a groan of pleasure as you meet her movements, thrusting deeper and harder than before.  "See?  Did I make it better?" you say with a grin.  She moans wildly and says in a labored voice "Oh god yes...  I have dreamt about fucking you for years...  So many times did I play with myself while thinking of this cock...  Harder please lil bro!"  You chuckle a bit and oblige her.  You reach over and grab the dildo and spit on it, placing it against her ass you ask her "are you ready for new experiences sis?"  She wiggles a bit and moves back against you and the dildo, "Always for you lil bro."  With that you slide the dildo deep into her ass and begin reach out, one hand moves around and down her body, rubbing her clit softly and the other hand cups one of her breasts and squeezes it.
  Moaning loudly you take your hand from her clit and grab a pillow, setting it under her face you then grip her long blonde her and **** her face against it.  You pound away over and over again, making sure that Laura has a chance to breath occasionally.  You feel yourself approaching climax and pull yourself out of her.  Groaning you say "Sis, suck me please!  I am about to cum and I want you to have it all!"  Laura whirls about and throats your manhood in an instant, sliding her head up and down on you rapidly.  You grip her hair and arch your hips up as you cum hard.  Letting load after load of your seed explode in her mouth.  When you finish she sits up, sticking out her tongue to show you all the cum you donated to her mouth before pulling it back in and swallowing.  "Mmmm you are yummy" she says with a grin.

  You lay back on the bed and she curls up next to you.  You tell her your plan to break her sisters and her mom and she nods and smiles before saying "Well... you said they were inferior right?  It would be a good idea to teach them their place...  Im in..." she says.  

  You sit there and think, well who's next?