"Can you bend over a little more?"
"The fuck do you mean, bend over more? My ass is already above my head, how am I supposed to bend over more?"
I sighed, pinching my brow together. Did every porn shoot involve bickering, or was that only when siblings were involved? "Just... reach for your shoes, like you need to fix the strap on your heels."
Kelly sighed, reaching down and dutifully posing with her fingers resting against the clasp on her heels. Thank goodness her wig was pinned in place, or it would have been all over the floor. Instead, the heavily styled hairpiece framed her face as she looked at the camera, joining her cropped blouse in the land of impossible physics. The blouse just barely covered my sister's nipples, and thanks to some cleverly placed adhesive, that wouldn't be changing no matter how much she bent over.
"Perfect, now give me some expressions. Try some frustration, maybe some impatience, like you shouldn't have to waste your time fixing your shoes."
"That'll be easy," Kelly groaned, but she did as she was asked. Something was still missing though, as I looked through the camera's viewfinder at my subject. Inspiration struck, and I walked over to her. "Hey, what are you doing?!" Kelly asked, as my fingers found their way around the overly short skirt she was wearing, and I pushed the fabric up my sister's ass.
"Just, hold that pose a moment longer," was all the instruction I gave. Perhaps it was the confidence in my voice, perhaps it was something else, but my sister's protests quickly died down to silence. I smirked, looking at her panties. Right now, they were covering too much of her cheeks, being rather conservative. Considering Kelly had been fixing them every couple of minutes, I had expected this. But it wouldn't do, not for the scene I had envisioned and needed to create.
In a single smooth motion, I gripped the elastic band of Kelly's panties and pulled upward. Immediately, the triangle of red cotton was swallowed up into her crack, and both cheeks bounced seductively on display. Kelly, of course, immediately began her protests, starting to stand up to both tell me off and to fix her underwear.
"We aren't done with that pose, sis." My voice was cool and controlled, and for a second Kelly seemed to fight an internal battle. I knew I had to tip her over the edge in the direction I wanted, but I wouldn't have much time. I wound my hand back, landing it clearly on her left ass cheek with a resounding crack.
I stepped back, admiring my handiwork. Kelly froze in position, a stunned and aroused look on her face. She was biting her lip, her eyes going a bit unfocused as she processed what just happened. I crouched down and lined up the shot, making sure to capture both my sister's lust filled face as well as the glowing red handprint developing on her ass. I took a few extras, just to be sure, enjoying the evolution of my sister's expressions. Surprise turned to lust, lust turned to desire for more, and desire turned into anger.
She stood, facing me. "How fucking dare you do that!" She cried out, storming toward me. In her heels, she was practically as tall as me, and she made for an intimidating figure approaching. "That really fucking hurt, you know! I... you..." Fire burned in her eyes, and for a moment, I worried I had lost control, that this sweet thing with my sister might be lost to me.
