Authors Note: All participants in this story are over the age of 18.
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It WAS a good prank. Well it would have been a good prank if it'd gone off the way she planned it. Unfortunately my stepsister and her best friend didn't quite get it carried out the way they planned. Now I don't hate Tammy. She is my stepsister after all. We haven't always gotten along. Just getting used to having a sister after being an only child for sixteen years was tough enough. Having to get used to a sister with a really warped sense of humor made the last three years a mixed bag. Her mom, my new mom, Elaine was alright. My dad seemed to like her and she made him happy, so what could I say? Even before she got married to my dad, she pulled me aside and brokered a deal with me. She'd not make life any more difficult for me than it needed to be if I didn't make life any more difficult for Tammy than it needed to be. It seemed like a reasonable arrangement, one which she has worked hard to keep her side of.
I guess the pranks Tammy seemed to always play on me was her way of dealing with suddenly ending up with a brother after being an only child for her first sixteen years. They weren't usually mean, and like I said, her warped sense of humor left many of them to be less than funny in my book. Of course when I complained to Elaine, mom, she simply told me that if I wanted to return in kind she wouldn't find that to be unreasonable or unfair, as long as the pranks weren't dangerous or illegal. Consequently Tammy found the periodic live critter in places they weren't supposed to be, like her dresser drawer. All of her bras missing or her underwear hidden at inopportune times, that sort of thing.
This prank wasn't meant to be mean either. I suppose it was her way of teasing me over not having a date on Valentine's Day. I was in the shower, taking care of business, if you know what I mean, when they slipped into the bathroom and dumped a container of some kind of pink powder and little red tissue paper hearts over the top of the shower curtain. Like I said, it would have been a good prank had she not lost her balance on the trash can, which she was using to get high enough to reach over the curtain. In her haste to escape she slipped and caught herself on the only thing that appeared to be strong enough to hold herself up, the shower curtain. In seconds, I found myself standing naked in the shower, with my hand wrapped around my hard cock, with both my stepsister and her friend staring at me.
In itself it would have been embarrassing to be seen like that by Tammy, but at that moment I was thinking about her best friend Vickie. And given my state at the time, I'm sure you can guess what it was I was thinking about!
Tammy and I had inadvertently seen each other in various states of dress and undress, which one would expect when you share a bathroom. But to date neither of us had seen the other naked, and it was my misfortune to be on the wrong end of that first time.
The girls didn't stay long, running from the bathroom screaming more in surprise at what happened than in fear of anything, since I was standing covered in pink powder and tissue paper hearts, unable to chase either of them down. I suppose it was good that our parents were gone for the day when I finally got cleaned off and stormed out, pounding on her bedroom door with less than pleasant statements being hurled through her closed and locked door from my side.
Two hours later I could still hear them in her room, giggling and laughing; I presumed at my predicament. My nineteen year old mind was busily working at just how I could get back at her. Little did I know that my chance would come much, much sooner than I could have ever predicted.
"Vickie! NO! Don't!" I could hear Tammy practically yell at her best friend through the bedroom wall.
"It's okay. I'll be back in a while." Vickie laughed. "You're the one that dared me, remember?"
"But not this!" Tammy cried.
"You know. If I were you, I'd not shout so loud. Unless of course you want your brother to hear you."
"VICKIE!"
"Uh uh. That was the dare. We're both the same or it's no go. Fair is fair!"
"But Vickie! If Andy comes in!"
"Well, you'll just have to be really quiet until I get back then, won't you?" she giggled before I heard the door of Tammy's room open and then close. I had to admit I was curious as hell. What were those two up to that they were worried about me seeing? And what was the dare?
I waited a few minutes to make sure that Vickie was gone and then snuck to my sister's room and gently inched the door open. To say I was shocked would be the understatement of the world. There was my stepsister, laying on the bed, completely nude, her legs spread and tied to the footboard with fat white ropes and her hands handcuffed to the headboard over her head. Between her spread legs was an assortment of dildos and vibrators. I was initially afraid she'd see me peeking in until I realized her eyes were covered with a heavy pink eye cover.
Like I said, I'd never seen her naked, only a couple times in her underwear, so I was in no hurry to close the door. Her tits were larger than I'd realized, each creamy mound sitting on her chest firm and round, easily larger than a coconut half. Her areola were slightly oblong with hard pink nipples sticking up toward the ceiling, almost as if anticipating being played with or licked. Even more surprising though was her pussy. Her full round lips were shaved as completely bare as her mound, a fair amount of soft looking inner lip already protruding and glistening wetly in the bedroom light.
I quietly slipped into the room, making damn sure the door didn't make any noise as I pushed it most of the way closed behind me. I really wasn't all that sure what I was going to do, but after the two of them got a really good look at me in a compromising position, I really couldn't help but take advantage of paybacks.
"Who's there?! Vickie? Is that you? You better damn well untie me! VICKIE!" Tammy shouted, apparently able to sense that someone had come in the room, expecting it to be her friend. I grinned and kept my mouth shut as I stepped closer to the bed and my struggling, completely nude sister. Laying among the sex toys on the bed was a large, soft feather. You know...paybacks are hell, and this was going to be one hell of a payback for a LOT of pranks against me. I picked up the feather and then, standing over her, began to draw the feather up and down her creamy thigh. "SHIT! Vickie you scared the fuck out of me! Now untie me!"
I grinned to myself and continued to tease her soft smooth skin with the feather, working it slowly up her squirming body, up her stomach to her exposed tits. I slowly circled each firm orb with the feather, making her gasp as I brushed it across the fronts and her sensitive nipples.
