You need release...

As you sit, contemplating the days events, you realize that your libido is raging. So many frustrations, so much stimulation without release...so many different taboos being pushed and prodded, so much build up without consummation.
You head inside to the bathroom. Running the water full cold, you dunk your head. YIKES! the shock clears your senses a little, but the old folk remedy of the cold shower isn't doing it.
You need your computer. Jenna's unlikely to be willing to break away from the movie for a quickie. If you don't blow off the pressure valve, you might end up doing something you'll regret{if RileyDaddyFan = 1
} like indulge Riley's little fantasy. That would be a huge price to pay for just a release.{else
}.{endif
}
But....Zoe's prohibition against climax...
God damn her. Why are you letting her do this!
You find yourself marching down to the basement. You push into the rec room. Zoe is in a bra, rarely enough, and shorts, lying on her back with a bowl to her lips, lighting it.
"Hey, Jimmy. Where... *cough* where's the fire?" she sits up.
"I'm so horny right now I can't see straight, Zo." A strange conversation starter with your sister, under normal circumstances. "I'm afraid of what I might do. I need to fucking jerk off. So I need you to tell me your plan, or I'm marching over to my computer and pulling up the nastiest shit and rubbing one out, and I honestly don't care whether you are around for it or not!!"
Zoe is smiling. She puts down the bowl, and stands up from the couch. She puts her arms around your waist, pulling your body in close to hers.
"Oh, I'm sorry, big Jimmy. I'm not trying to get you twisted up. I'm trying to help you."
"Well, I'm done until you tell me the plan."
"Sit down."
You oblige, and you aren't totally surprised when she straddles you.
"I've been working on Jenna for months about the idea of....a threesome."
"What?! Zoe that's-" she puts a finger to your lips.
"Just hear me out. I always paint the picture of it just being for her. You and me, spitroasting her with my strap-on." You shudder a little. You don't need the images of her and Dane that toy implies. "Eating her out while she sucks your dick, letting her eat me while you fuck her."
"Zoe this isn't helping!"
"Heh.... sorry."
"So how's that supposed to help?"
"To fix your problem, you need to condition your dick to climax with the feeling of Jenna's pussy. You've gotten too far away from that with porn, your dick doesn't recognize a good pussy anymore." She's grinding now. "So, you need something different... something... forbidden.." she reaches down to pop the button on her jean shorts. "To get you almost all the way there, and when the time is right, you get the rest of the way while inside Jenna. You do that until you've reconditioned your dick." She sits back on your thighs, sticking a hand down the front of her shorts. She comes back out with glistening fingers.
"Go on..." she sticks the fingers under your nose, and involuntarily, you take a big whiff. Nnnnnggg. That familiar yet foreign scent of strange pussy. In your heightened state, you just grab your sister's hand and shove those wet fingers in your mouth.
"Mmmmmm...." you both moan together in unison. Her taste... the same yet not the same, just like the smell. A little more tangy, a little more fluid, than Jenna's typical juice.
You pull the fingers free of your mouth.
"How is Jenna ever going to go for your little modifications, though? I don't think she's going to just blithely let me stick my dick in my own sister.." Saying it out loud... makes you realize how much you actually want to do it.
"Jenna loves me, almost as much as she loves you, James. I can convince her. She's a bigger freak than you give her credit for. Remember, me and her talk a lot about sex." She leans down to stick her tongue in your mouth, just like this morning. You reciprocate fully this time.
"I'll let you in on a secret: She and Karen fooled around when they were teenagers."
"WHAT?"
"Yeah... apparently, she even let Karen eat her out one time. So you see? She can be persuaded." She kisses you once more, and you cradle her head with your hand as you return it fiercely.
"Zoe... I...."
"Mmhmm." Zoe nods, staring into your eyes. "Me too, big Jimmy. Always have. Now we should cut this out or all this planning will go to waste."
You whine against your will. This certainly did not help your need to pop. It's made it worse, of course.
"Jenna and Karen are planning to hit a club tonight after the movie. I'll insinuate myself along with them. I guarantee when we get home, she'll be DFA."
You have **** but to trust your little sister, the devil.