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You look at Naomi, then at Heather on the floor, and think about what you want to do. The craziness of the day is catching up to you, and all the sex and excitement has made you pretty tired. You can miss the rest of your school day without much trouble, so you finally decide to head home and rest. You want to be ready for your date later anyways, or whatever it ends up being.

"Well, what do you think?" Naomi says while tapping her foot on the ground impatiently, which makes her boobs jiggle uncontrollably.

"I think I need to rest for a bit. Kind of a lot has been happening, and I have some things I need to do tonight. So you can mess with her some more I guess. Oh, and if you decide to do anything with her I give you permission to orgasm."

Her eyes widen at your last statement, the gears in her head clearly turning. She shoots a sidelong glance at Heather, then says, "Thanks! I'll probably bring her home in that case." She looks down for a moment, then haltingly says, "Will I... see you tomorrow?"

"Yeah, for sure. Maybe meet up at the library in the afternoon? We can figure it out tomorrow, if that's alright."

"For sure," Naomi replies with a grin. She reaches down and heaves Heather over her shoulder, then says, "Huh, she's somewhat light, but I guess if she's a sex doll she'd have to be moved. Anyways, I'll see you tomorrow, thanks for today, and don't get into too much trouble in the meantime."

"I'll certainly try. Have fun with Heather tonight and see you tomorrow."

"Oh, don't worry. I'll have fun." She shoots you a grin, then turns and walks away.

"Ominous!" You call out to her back, watching her for a moment. Her ass bounces with each step and you can see her boobs swaying and jiggling from side to side even from behind. Somehow, despite everything that's happened, your dick manages to twitch. Ignoring it, you set off towards your car in the opposite direction.

The walk is fairly uneventful, as is the drive. The whole time you're mostly zoned out from a combination of fatigue and day dreaming about using your powers in more and more erotic ways.

As you walk into the house, you see your sister lean around the couch she's sitting on to see who came in. Her face registers disappointment and you hear her say, "What are you doing back so early? Couldn't hack it at school?" before returning to watching television.

You sigh, used to your sister's unwelcoming behavior, and start to head to your room. Your mom should be out playing cards with friends for a few hours and it's unlikely your dad will come home from work anytime soon, so you think that you could probably get a few hours of uninterrupted sleep before your night starts. Still, although your sister has always been a bit of a bitch to you, for some reason you find yourself focusing on it, unable to let it go.

Before you reach your room, you feel all the anger bubbling up inside you and shout back at her, "Hey, Emma, I could hack it. That's why I'm still enrolled in a fucking university, and you're a glorified goddamn couch potato." With adrenaline shooting through your body, you rush the rest of the way into your room and close the door, breathing heavily.

Suddenly, you hear pounding on your door and Emma yells, "Dipshit! I could've made it through college, I just didn't care and you know it! I'll be back on my feet once the year is up, while you'll be alone with a diploma and nothing to show for it."

Your body tenses and you lean back. It's true that she has the potential to do well, though you somewhat doubt it, and if she does it'll largely be because of her figure and her ability to put on a sweet persona. Unless she actually puts her mind to something for once, then she might discover some hidden talent lying in there somewhere.

You know that people have always looked to her before you , associating her luscious blonde hair, angelic face, and voluptuous yet toned body with future success and discipline. But you also know that she did nearly nothing for it, while you struggled to get where you are, always one step behind.

Everything comes to the fore, and you finally explode and yell back, "Maybe you will, but I fucking doubt it. So you can keep screwing me, which we both know won't affect the trajectory of my life, or you can screw yourself even more that you are now." You hear her gasp, then say with a cold, icy tone, "I genuinely don't think you can do anything else, and I don't think you do either."

"Fuck you!" you hear through the door. Blinded by the rage in the moment, you shout out, "Well, answer me! Which would you rather do?!" Immediately you step back, your hand rushing to your mouth as you realize what you just said. The tension drops from your body, the rage replaced with nothing but fear and trepidation. You desperately hope the power won't do anything to her, and that if it does the result will be minor. If it does come into effect, you're not even sure how your question would be interpreted.

After listening intently for a moment, you don't hear anything. Sighing, you take a step back, but the momentary relief you felt is quickly squashed as Emma yells back, "I'll screw you, you fucker."

Thoughts of what she could do to make your life worse flash through your mind, and you grimace. Your door bursts open and your sister storms in, mad as hell. While taking a step back you say, "Hey, I'm sorry, just stop for a minute and-"

Emma steps forward abruptly and you flinch back, but she reaches her arms around your torso and pulls you in quickly. Your surprise can barely register before her lips lock on to yours. Her hips grind into you, and you feel your dick throbs despite yourself. You've only ever thought of your sister this way in momentary flashes that you've buried deep in your mind, partly due to her treatment of you and partly due to the taboo. But you can't deny how hot she is, and now that this is happening your thoughts are being overrun by sexual fantasies with her.

You told her she could keep screwing you, with all your repressed fantasies in mind. As your lips press against hers and her hands fall to your lower back, that thought burns itself into your memory. You did this, influencing the power by using a word with sexual connotations and allowing the twisted recesses of your mind to bring those connotations to fruition.

All of this flashed through your mind in the span of a few quick but passionate kisses. Despite yourself, you push your lips against hers, enjoying the moment. She pulls away and says, "Fuck, I'm gonna screw you," her face consumed with lust.

The two of you quickly remove your clothes and she pushes you roughly onto the bed with a mixture of anger and arousal. Throwing her thick thigh over your hip, she gets on and straddles you, then grabs your erect dick and maneuvers it to the entrance of her pussy. Her hands clasp your wrists above your head as she slowly lowers herself onto you. You feel her slide down, her tight folds gripping and caressing your aching member.

Once she's taken all of you in, she leans down and kisses you one last time, her boobs squishing into your naked chest. After leaning back and settling into position, she starts to buck her hips and move herself up and down, slowly at first until she gets into a comfortable rhythm. You begin to thrust in time with her, forcing a moan out of her lips as her grip on your arms tightens.

Her large tits bounce in front of your face, and you reach up and cup them. They're large enough that you can't get anywhere near holding them in your hands, but you squeeze and massage them as Emma's breathing grows heavier. You suddenly grab her large ass and pull her wide, perfect hips into yours even as you lean up and suck on one of her tits. She moans and bucks harder and faster in time with your own thrusting hips and pulling arms. Despite the day you've had, you quickly find yourself approaching the edge. She says, "I'm gonna fucking cum soon."

Without thinking you pull her hips as close to yours as you can while thrusting your dick as deep into her as possible, and feel your dick pulsate with pleasure as you have an intense orgasm. Emma feels you cumming and quickly does the same, her whole body shaking in ecstasy. Her pussy contracting extends the life of your own orgasm and you continue to pull her in, though you shift your mouth from her nipple to her lips, engaging her in a deep French kiss.

Soon, you're both coming down from the throes of ecstasy you had just experienced. Shit, you really just fucked your sister. But it was just an accident, you have to tell yourself, a mistake of your own horrendous making. Now, though, the sexual fantasies you just had of her are only intensifying as you replay your experience in your head and see her gorgeous body nude before you.

Your eyes widen as you realize that you came in her, and it seems to you that hers do as well. Desperately, you blurt out, "Would you rather be unable to conceive a child with me or have any child that we happened to conceive be perfectly healthy."

You wait with bated breath. Your sister lays on top of you, her boobs pressing into you chest and your softening dick still in her. Finally, she says, "Well, I'm going to keep screwing you, which I don't really understand. It's... weird, and wrong, but this awesome fuck makes me happier about it. That's for sure." With that she gives you a light peck on the cheek before continuing by saying, "I don't like my chances long-term with anyone else if we're screwing. And I do want a kid someday. So I would say that, given the choice, I would pick having a healthy baby. "

She raises her head and gives you a weak smile, then rolls off and lays next to you, her body pressed softly against your own. Your heart sinks a little, even if the implications slightly turn you on. You don't necessarily want to have a kid yet though, so you think you'll likely be more careful in the near future. You look at your sister and see contentment etched on her face, then think about what you should do next.