This is my first story on this site. I appreciate all constructive criticism. Rock On!
Shelly walked up the steps of the bus ahead of me, and as agreed she took a seat in the very back. The bus was never crowded anyway, and today it was practically empty. She sat down and scooted over to the window, an angry pout on her face. I sidled in beside her and set my pack on the seat across from us. When the bus reentered traffic I turned to her, studying her face. She wouldn't meet my eyes.
"Okay," I said, "Let's see it." Now, she looked at me, anger turning to rage, turning to shame.
"Isn't there something else I can do?" She pleaded. "Anything?"
"We had a deal," I said casually, "If you don't want to uphold your end then I will let Mom and Dad know what you did." I smiled sadistically, "Either way, no difference to me."
"This is sick!" She looked at me with a horrified expression. "What kind of freak are you? Ever since you turned 18, you've been acting like a fucking weirdo."
"Look, it sounds like you have made up your mind, and that is fine with me." I stood, reaching for my pack, intending to take a seat forward in the bus. She grabbed my skirt.
"Karma, wait," her shaky hand released my skirt when she saw I was listening. "Okay, okay, I'll do it. But why here, on a bus?"
"To add to the excitement, to show you how bad you fucked up and how much power a few pictures I took can give me over you. And, I guess as payback for all the times you narced on me." I sat back down and turned to her. "Now, let's see it."
Closing her eyes, and with shaky hands, she lifted her skirt, shifting from one butt cheek to the other so it was over her hips. Her shiny, twenty year old, beautifully waxed pussy sparkled in the dingy light pouring through the window, she wasn't supposed to wear panties.
"Spread 'em wider," I commanded. She did. "Play with it, get it real wet." Mortified, eyes still closed, she moved an unsteady hand down and started to play with her pussy. I looked around, no one would ever suspect what was happening back here. I watched her fiddle around with herself, teasing her clit. I could feel my own pussy getting excited, starting to moisten up. I turned and reached for my pack, setting it in my lap. Shelly opened her eyes to see what I was doing but quickly shut them again when she saw me smile at her, blood rushing to her already rosy cheeks. I retrieved my camera from a side pocket and stashed it next to me on the seat, putting my pack on the floor. I watched Shelly for a few more minutes, getting hornier and hornier. The bus plodded along, making occasional stops, but mostly it was the few passengers getting off. Soon, there would be no stops for about thirty minutes as we traveled from one suburb to the next.
"How's it going? You wet yet," I asked.
Shelly slid her finger up her crack, "Not yet," She sounded disgusted with herself. We rode along a few more minutes and I sat there watching her play with herself. She slid her finger again, testing her wetness, and the tip easily poked inside a little bit, "Now I am," she said.
"Let me see that finger." She held it up for me and I took her wrist pulling the finger to my mouth sucking on it. "Mmmm, big sis, you taste good." I ran my own finger along her crack, dipping the tip inside. Shelly squirmed, but didn't protest. I stuck it in my mouth.
"Is that enough?" She asked, starting to pull her skirt down.
"No, no, my sweet. You keep doing what you were doing. We have a ways to go yet."
She made a disgusted sound and returned to her ministrations. I watched her masturbate, getting so aroused that it was impossible for me not to move a hand under my skirt. My dripping pussy sighed when my fingers started rubbing. In less than a minute I felt an orgasm rushing at me, my eyes glued to my big sister as she rubbed herself. I came, going rigid and slack at the same time, shoving a finger in my pussy so I could feel it contract around it. The rush slowly ebbed and I withdrew my finger, savoring the taste of my come and dipped two fingers in again to taste some more. Shelly was staring at me.
"Did you just come?" she asked, disbelief written on her face.
"I sure did, sis," I answered, breathing heavy.
"How did you do that so fast?"
"You, my dear, are a sexy bitch and watching you play with yourself is incredibly erotic." I took another taste of my come.
"But, I am your sister. How can that turn you on?" She sounded truly baffled.
"Honestly, it doesn't bother me at all, it heightens it. We are sisters, we're not going to breed. I'm not going to tell any one about this, I'm positive you won't." I smiled at her, "It's just sex. Pure and simple. Naked flesh, fingers, tongues and orgasms. That's it."
"Well, I find it completely anticlimactic, immoral and disturbing. There is no way I could orgasm from this, and that you can says to me that you are fucked up in the head." She said all this, but her fingers never quit giving her pussy attention. I didn't point that out.
"Oh, I bet you could, if you weren't such a prude. You wax your pussy, obviously you have some sexual desire."
"I have plenty of sexual desire, just not with my extortionist sister," she blurted, defensively.
"So your desire might then be limited to the bedroom, and your clumsy boyfriend, with the lights off in the Missionary position?" I was goading her, but it was fun. I knew my argument was ludicrous, but I enjoyed getting her worked up.
"Are you serious?" she asked , incredulously, "You think because I won't come on the back of a city bus while my incestuous, blackmailing sister watches means I am a prude?" She was getting fired up now.
I tried to diffuse the situation a little, "All I'm saying is, you could enjoy the situation for what it is, and get as much out of it as you can." That was weak too.
"I feel like this is a sort of rape."
