Being a slave to my twin sister is just so naughty and forbidden. Of course, the slave contract I had signed stipulated that I was required to serve Lexis for an entire year. There's no backing out, even when I feel guilty about having incestuous sex with my sister.
Being powerless and forced to obey makes the whole thing far more delicious. I love the fact that all decisions have been taken away from me. Now I'm just a naked slave, to be abused, objectified and punished. My sister has all the power and there's nothing I can do to stop her. I do whatever my sister orders me to do, or I get punished.
One of the things my sister ordered me to do was to assist in building a dungeon. My sister drew up the design for the dungeon and Ionna and I did all the grunt work. Of course, Ionna was fully clothed while she worked, while I was indecently naked.
Our basement was an ideal location for building a dungeon. It was deep but dry, with stone walls and rough wooden stairs that creaked ominously underfoot.
As I toiled under Ionna's close supervision there was a near-constant tingle in my loins. The basement was a dark, windowless room, ominous and unforgiving. I was naked and barefoot, while Ionna, fully clothed, constantly gave me assessing looks as I helped assemble intimidating bondage devices.
Sometimes Lexis would come downstairs to check on our progress. Twin sister notwithstanding, an important part of my brain already saw a stern authority figure, a predatory female who could sexually assault me without warning and punish me for the slightest infraction of her strict rules.
My heart sped up every time she came near. A cocktail of emotions would stir inside me, equal parts fear, sexual arousal and anticipation. I would tremble involuntarily at her approach, wanting both to flee from her intimidating presence and kneel submissively at her feet. Of course, I did neither and instead waited for her to issue me orders.
A central feature of our newly constructed dungeon was the bondage bench. When it was finished, Lexis came downstairs to examine our handwork. She looked it over, declared that it looked sturdy, and ordered me to place myself on it to be fastened down so she could evaluate its ability to hold a naked girl securely and keep her helpless.
Wide leather straps held me down with my ass raised up prominently, my legs spread wide, and my arms stretched down in front. Lexis ordered me to try and get free. I strained against the leather restraints securing me to the bench, but no matter how much I struggled, I couldn't get free. The bench would hold me helpless until Lexis or Ionna set me free.
"I'm not sure this qualifies as a true test of the restraints," Ioanna observed. "A slave will struggle much more vigorously when she's being tormented. Extreme pain will ignite her fight or flight response, speed up her heart rate and trigger a surge of adrenaline into her bloodstream."
My sister put on a playfully sinister voice, replying, "So, you're saying that it won't be a true test unless Laura is being truly traumatized?"
"Exactly! If the restraints can hold her securely when she's enduring an overwhelming amount of pain, then we'll know for certain that we've built a bondage bench that can really hold a slave."
My neck was held tight against the bench, and I couldn't look behind me, but I heard my sister's footsteps as she walked over to the side of the room where the whips, riding crops and leather straps were on display. When I listened to her footfalls returning to my location, I imagined that she was holding something thin and leather that would sting horribly.
I knew I was about to be whipped and I felt a surge of delicious fear. I craved harsh punishments, but I feared them as well. I squirmed as much as the leather restraints would allow and in a tremulous, plaintive voice, I implored, "But, mistress? What have I done?"
"Nothing, my love," Lexis replied, and I felt her cool fingertips tracing soft, slow lines up and down my indecently displayed labia. "But, as you may recall, I told you I would be a very cruel mistress. I said that I would sometimes punish you just because I would take pleasure in hearing you scream. I told you this even before you signed that slave contract."
I whimpered as I felt my sister's fingers play with my pink slit. I had been denied permission to cum for almost a week, and I was dripping wet. Lexis's fingers heightened my arousal, and I moaned shamelessly as my sex throbbed with hungry spasms.
I melted inside, and an agonizing wave of desire passed through me as she stroked my pornographically exposed bald pubes. I felt feverish and when I spoke next, my voice was clotted with desire.
"May I cum, Lexis?" I asked, desperately.
"That's Mistress to you," my sister replied sternly. "And no, you may not. I just want you good and hot before we begin."
I felt shameful and slutty with my legs spread so wide and my plump, glistening pubic lips so blatantly on display. It seemed unfair to be so ready for sex and yet to be denied. Of course, that was one of the things that attracted me to slavery in the first place; the blatant unfairness of it. Somehow the suffering, humiliations, harsh punishments and the unfair treatment acted as a powerful aphrodisiac for me.
I was about to make a self-pitying comment when the correctly anticipated narrow strip of leather snapped across my naked buttocks. I felt the stinging impact of the whip before I even heard the sound. And before I had time to catch my breath Lexis swung two more times, for a total of three strokes across my innocent bottom before I had a chance to scream.
"Aaaahhhh!"
There was a brief pause as Lexis examined the stinging red stripes she'd placed on my backside.
"They're gorgeous," my sister assured me. "It's a shame you can't see them."
I was panting and still trying to recover from the sudden burst of pain when my sister started up again. My ass became a riot of red-hot glowing pain, then Lexis moved lower, toward the more sensitive skin and harder muscle of my thighs. My throat became sore as my screams became more frantic and desperate.
I screamed, whimpered and whined under the cruel barrage of lashes across my naked flesh. The pain was far more intense when she whipped the backs of my thighs, and I jerked uncontrollably in my bonds. My eyes welled up with tears as I writhed helplessly. The whip burned and stung, and I embraced the unfairness of it all. I was a sex slave. And this was what happened to sex slaves.
* * *
It became a ritual. Each time we finished assembling a bondage device for the dungeon, Lexis would mark the occasion by fastening me securely to it, then whipping me until I was writhing in uncontrollable agony.
The day Ionna and I finished putting together the whipping frame, Lexis bound me to it spread eagle, pointing out as she did so that it left my entire body available. I could be whipped equally easily from the front or the back.
And with my legs bound helplessly far apart, my pussy was indecently on display and vulnerable. Lexis took advantage of my defenseless state, palming my sex and feeling up my vulva from front to back, parting my labia, and moving a finger along my moistening cleft.
"Your breasts, your cute little ass, your firm abs, your beautiful legs, your shaved pubes," my sister whispered as she leisurely played with my plump, glistening pubic lips, "every inch of you is accessible now."
Rather than just talk about it, my sister went on to prove it, starting in front. She used a single tail whip, a leather strap and a riding crop in rotation to redden my naked body and make me fill the dungeon with my high-pitched screams. When I looked down, I could see the painful stripes she had placed on my breasts, my abdomen and my thighs. They hurt deliciously and roused deep passions in my loins.
"Oh, if only your friends could see you now," my sister sang out gleefully, admiring the vivid, scorching stripes she'd created up and down the front of my body.
My sister's tone was playful, but I worried she might be serious about putting my naked body with my vivid whip marks on display for my friends to see. She'd already brought Riki over to see how I'd been subjugated and reduced to serving as my sister's naked sex slave. If she brought any more of my friends over to see me like this, I would be mortified beyond words.
"Oh, please don't allow any of my friends to see me like this, mistress," I blurted out plaintively.
My sister responded to my plea by snapping her whip across my lower abdomen, missing my Venus mound by a few scant inches. The next lash sliced painfully across the top of my thigh and my exposed outer labia.
"
Aaaaghhhh!!!"
It was scorching agony when the whip struck me, but after the initial impact the pain slowly subsided to a throbbing, sensuous afterglow. After my initial scream, I panted and adjusted to the pulsing burn that had been inflicted on my skin.
"You're my most prized possession," Lexis informed me after I got my breathing under control. "You're the most exquisite thing I own. Of course, I'm going to show you off. It would be foolish to own such a delicious slave and not to."
I didn't challenge Lexis's opinion. I could tell this was important to her and if I dared to disagree, she would just whip me until I succumbed to her way of thinking. I simply nodded my head as if I agreed with her.
Lexis smiled at my response. And with me duly admonished she resumed whipping the most exquisite thing she owned. She enjoyed watching the look of terror and bitter anguish on my face, so she whipped my front, ignoring my backside completely.
It was an unconventional way to whip a girl. Normally a girl is whipped across her back or her buttocks. Lexis whipped me from my breasts to my thighs, then back to my breasts again. Stinging red stripes eventually covered the front of my body