(All characters in this story are at least 18 years of age.)
The day had started well, as they all had since the glorious Saturday not long ago when I discovered my estranged sister was as depraved in her sexual tastes as I; a joyous discovery that led to her gleefully becoming my submissive slave and accepting me as her Owner and educator in an incestuous BDSM relationship that she'd craved in the two years I'd been away from home. So far this morning I'd been awaken in the prescribed manner by her stealing into my bedroom as soon as our mother and step-father had left for work and my letting her proudly show off her newly gained skills in oral obedience....this devotion to serve moving me to cum inside her then indulge her arousal at this crude usage of her by masturbating her to climax. As I say, a fair start to the day but with a slim and beautiful 18 year old slut as enthusiastic for corruption as my sweet sister every minute was precious and not to be wasted, especially as her new term at university would be starting soon and these idyllic full days would be no more. We were collapsed on the floor of the bedroom of my youth, and, knowing her growing confidence in her attractiveness, I'd held her lewdly in front of my full length mirror so that she could see what a tantalizing erotic sight she presented in my arms as I manipulated her clitoris and fed her the seeping of my cum as it escaped her engorged cunt with my fingers. In fact it was such an intoxicating vision that I hadn't been able to resist entering her irresistible body again to fuel her orgasm; violating her anally and enjoying her desperate disconnect of climax as she thrashed helpless in my supporting embrace with my appreciative erection impaling her deeply.
Said erection was now quivering in the open air disappointed as my delightful fuck puppet cooed contentedly... the animal urge to bury my throbbing cock back where it belonged inside my sister was strong, but I could never match her capacity for orgasms and the personal self-denial was an important stimulant which added to the adrenalin build up of the day until I decided it was time to reward her various trials with the chance to make her Owner cum. With that in mind I playfully slapped her buttock.
"No time to rest, Possessed. Let's get cleaned up for today's lessons," I said indulgently and was pleasantly surprised when my mischievous teenage whore deliberately misunderstood my intentions and getting low on all fours began to lap at my rigid cock, still coated with a mixture of her luscious juices and my spunk as well as a fresh trickle of pre-cum that penetrating her tight arse had triggered. I let her lick my solid erection for a little while but when she moved onto wrapping her soft lips around the swollen purple glans and dragging her sharp teeth across the sensitive taut flesh in a way she knew drove me to distraction I had to admit the danger of losing focus and not unkindly I grasped the tangle of red unruly hair and pulled her head off me.
"You know what I meant, you greedy little slut," I said sternly and the slap to her backside was a little firmer this time. "Bathroom duties," I admonished and she sprang to her feet instantly with a poise and grace that advertised her interest in dance amongst her many other scholarly pursuits. As she skipped out of my room to prepare the shower I once again marveled at the sheer sensual splendor that my 18 year old sister personified, especially as I knew that her deviant imagination and intelligence were just as exciting as her perfect pale and flawless body. The possibilities of having such a sincere submissive as my undisputed property still made my head spin; the fact that she was my younger sister only added to the desire I felt for her and the urge to make her reach her full potential for taboo gratification.
Naked I followed her to the bathroom, it already steamy with the full flow of hot water in the shower where the familiar silhouette of my sister could be seem through the curtain as she stood waiting. I joined her and she immediately began to soap me, lathering my upper body carefully. That first day I'd taken possession of my succulent sibling she'd suggested this post-perversion washing ritual, an ideal service that probably would never occurred to me unbidden. Of course she'd had dreams of this kind of dedicated sex slavery for a long time and obviously given it a great deal of consideration in her fantasies, a fact that I was hardly about to not make use of and since then I'd urged her to express all her darkest desires and day dreams to me in order that I could bring them to fruition.
Even in my highly aroused state I found my sister's delicate touch soothing in this cleansing situation, at least whilst she was working on my chest, shoulders and back and in this blissful state I once again found my mind returning to the events of that wondrous first day when my sister surrendered herself totally to me. These constant flashbacks would probably be getting annoying by now if this was a literary piece, I mused, but the strength of memory concerning that intense beginning to my present happy position kept drawing me back, if only to inspire higher levels of lust that I could share with my wanton pain whore.
My memories took me co-incidentally back to the moment I'd left off in Chapter Two when I'd tied my excited sister down to the posts of her 4 poster bed and took her virginity with teasing firmness, cumming together in a riot of raw lust that left us both dazed with its intensity. I recovered my senses first and became aware that I was crushing my lovely delicate slave underneath my panting body, tho' she seemed to be in such a blissful sexual coma that she was uncomplaining of any discomfort, even though the rope binding her arms was biting into her wrists. Only after I'd untied her hands did she become aware of her surroundings, showing a slight distress at being set free which had disturbed her post coital reverie, but once I'd untied her ankles and laid back to draw her close to her Owner she slipped back into a contented ease and laid with her head on my chest with surprising familiarity, murmuring endearments and promises of submissive devotion.
"I never thought that sex could be so earth shattering," she eventually declared happily as she idly gazed down my body to my still erect penis, glistening with a sheen of our combined love juices, "Never let me go, Master, teach me everything, teach me how to be the best fuck and the sluttiest slave ever. I want to make you happy, Sir, train me to make you happy."