The frenzied way she was thrusting her thighs against my hand to force my fingers a little deeper inside her young body told me she was past the point of no return again and so, giving her breast a final bite, I dragged my teeth off her extended nipple protruding through the saliva soaked cloth and whispered in her ear. "Right, slave, prove you are mine, cum hard for your Owner." "Yes, Sir," she sobbed as she bucked uncontrollably, arching out of the seat and hitting the steering wheel as her body convulsed with spasms of pure electric rapture. I pulled her face to mine once more and stifled her incomprehensible words of passion with another kiss... sharing her climax with this simple intimacy that seemed to prolong her orgasm until she went limp in my arms.
I thought for a moment she'd actually passed out due to the intensity of the moment, but when I looked down into her angelic young face, the sheen of sweat shining in the darkened surroundings, I noticed her eyelids flicker and a slow smile of post-coital content spreading that put my mind to rest.
However blissful grinning seemed to be all she was capable of; this latest orgasm had sapped the last of her physical strength and I was eager to get her safely back into the house where my Ownership of her was complete. Therefore I exited the passenger side of the car quickly and gathered her up in my arms to carry her indoors, the carrier bag full of purchases my sister clutched possessively as she allowed herself to be transported the last few feet of our shopping expedition. As I approached the house with my light burden I couldn't help noticing the curtains twitch slightly in the upstairs window of our next door neighbours and I wondered idly if our dalliance in the car had been observed. I was more shocked to realize that I didn't really care if we had been.... a dangerous attitude that I'd have to be careful of in future. Still, it was fairly dark and it wasn't even as if I knew who lived the house next to us anymore, the family who'd lived there whilst I was growing up having moved out whilst I was living independent of parental guidance. Hopefully they wouldn't poke their noses in, even if the sight of a stranger carrying their neighbours' bedraggled daughter in would warrant it. We reached the front door without being challenged and I managed to find the keys and unlock it without disturbing my sister's happy snuggling against my chest; once over the threshold I maneuvered my precious load into the living room and gently laid her semi-conscious body down onto the sofa to recover from the exertions of the day.
I stepped back and once more marveled at the beautiful teenager stretched out in a near sexual coma with a blissful look of contentment making her face glow. She was all mine. Before she drifted off into real sleep I removed her sweat pants and helped her struggle out of her top so her glorious nakedness was once more in evidence and then I stood admiring my possession until light snoring marked her slumbering state. Even seeing my sister in this relatively innocent condition was stoking the fires of my lust again, but I didn't have the heart to disturb her; she'd earned a rest and besides now I had the correct instruments to work with I planned to extend her education in heavy duty Discipline whilst we still had the house to ourselves... It was better to let her have an hour or so napping so she'd be wide awake and receptive for her forthcoming ordeal. I silently left her dreaming of the day's debauchery and after making myself a snack unpacked the purchases of the shopping expedition then went upstairs to my room... I figured a quick 40 winks would probably be in my best interest too... Once I resumed my sister's training I intended to prolong the session far into the night.
I set the alarm for 10 pm. That would allow me just under two hour's kip which I judged should keep me going admirably. Laying down I closed my eyes and replayed the sordid excitement of recent events in my minds eye... I drifted off into a deep sleep with a smile on my face and a cast iron erection tent poling the sheets. Suddenly the alarm clock was blaring out and I was wide awake again. Instinctively I switched it off before actually realizing who, where or why I was... then the familiar/unfamiliar surrounding brought me back up to date, as did the definitely unfamiliar sight of my naked sister blinking up at me from the floor in a curled up position she'd occupied on my bedside rug. "I woke up and came looking for you, Master," she said by way of explanation, "I hope you don't mind me waiting for you laid here, Sir." Well, I could hardly punish such dedicated sisterly enthusiasm, although laying on the floor, whilst being in good submissive spirit, seemed a bit of a waste considering I'd have preferred to awake feeling her warm soft body next to mine. Still, she had looked extremely cute curled up awaiting her Masters attention. My innocent sister was improvising upon her role as my perverse pet and I could hardly punish her enthusiasm. Or could I? "Stand up straight when you address your Owner," I barked with mock severity and she jumped to attention instantly with such a solemn look on her angelic face that it gave me a jolt of possessive lust. I rose from the bed, realizing my cock was displaying its usual "morning glory" and bobbing fully erect, and once again marveled at the sheer erotic splendor that was my naked (except for her collar) sibling. Even though it had only been that very morning that her eager violation and Domination by her big brother had freed our buried licentious and incestuous desire for each other, already I regarded her as my fully Owned sex slave; admiring her nude perfection seemed the most natural thing in the world to me and she seemed to revel in my lewd inspection as I slowly circled my teenage possession. Her nipples were twisted into tight knots jutting prominently from her small, pert breasts and her taut arse cheeks still bore the raw vestiges of earlier mistreatment... Everything about her radiated arousal and invited further sexual depravity. I couldn't resist stepping close to her from behind so I could cup her tits in both my hands and press my solid cock against her punished buttock flesh, my pre-cum making its progress as I trapped it between our bodies, frictionless. I felt her melt backwards against me as I took control of her yielding body once again and nuzzled the back of her neck above her leather collar with my lips and teeth as my hands molested her fascinating chest, tweaking the nipples as our mutual passion rose again.