The Twins
Copyright© 2001 by Martina2023
Chapter 32
Incest Sex Story: Chapter 32 - A pair of 16 year old twins stumble into a sexual relationship that takes them to the very edges of biological reproduction, where they become the guinea pigs...
Caution: This Incest Sex Story contains strong sexual content, including mt/ft Lesbian Zoophilia Incest Sex Toys Bestiality Pregnancy
Richard invited her to stay whenever she liked again. It was a good opportunity to hide her thickening waistline from her parents and prying neighbours. She tended to stay at weekends and return to her 'duties' during the week. She could have worked 36 hours a day, if she wanted, she had to turn down so much work.
One Friday evening as she wandered about the animals, she spied King, the magnificent white stallion in the back field. She enticed him over to her with a handful of long grass and when he was standing beside her she reached for his pouch again. Snorting in contempt he ate the grass and trotted to the middle of the field again.
"Suit yourself, big boy!" she murmured annoyed with his attitude. "People pay a fortune for me to touch their dick and you're to stupid to want it!"
Lisa had never got the size of his erect penis out of her head and it's power preyed on her mind. She recalled a phial of liquid in Richard's laboratory that was labelled ' Equine pheromone'. She wondered???
Hurrying back to the lab, she searched frantically through the cupboards. Finally she found what she was after and she scurried back to the field. Unscrewing the lid she exposing the yellow fluid to the air. The reaction of King was almost instantaneous...
From nowhere, his huge penis hardened and dropped from its restraining pouch. Lisa estimated it was 20 inches long and she would need both hands to hold it. King snorted in confusion, looking for the mare on heat that was sending out such a wonderful aroma. But there was only Lisa with her small phial.
He moved cautiously towards her, his nostrils flaring, in an attempt to locate the source of the smell that had hardened his dick. She held out the phial and King took a huge sniff of its aphrodisiac contents. She had him hooked...
Dropping to her knees she reached through the fence took his hugeness in both hands... A drop of slippery ooze appeared from the slit on the end of the bloated cockhead and Lisa stuck out her tongue and licked it off. It tasted a little salty. She licked all around the bulging head and ran her tongue down his impressive length, then back up to the tip. She parted her lips and pushed a little of the head into her mouth. Her hands resumed their pumping motion and she pushed as much of the prick into her mouth as she could. King's massive cock began to throb and Lisa knew what was about to happen. She removed one hand from the animal's cock and rubbed two fingers against the straining material of her panties. Her other hand quickened it's pace. Suddenly a huge blast of cum shot into her mouth. Then another. The hot, white liquid filled her mouth and she took a big swallow but it started to fill her mouth faster than she could swallow it. Lisa took the cock tip from her mouth and got a blast of cum in the face and on her bouncing breasts. Her own orgasm peaked as her pussy clamped down on her fingers wriggling within her underwear. King continued to pump thick globs of cum onto her blouse and skirt. Lisa and her horse shared their orgasms for several more moments before they were spent.
Lisa's head was spinning and she sat back to regain her balance. She was literally covered with sticky cum. King's cock was growing limp and receding back into its sheath and he was grazing on grass again.
"Too bad I'll never feel that monster slide into my cunt", she thought "The size of it would surely put me in the hospital. Wouldn't it... ?"
In bed that night, Lisa dreamt that she tied King to his stall in the stable and using the equine pheromone, she lay underneath him whilst he skewered her with his huge stiff length. She awoke sweating and wanted it to really happen...
The next day, she remebbered something that might help her. It was a the corset man's device. She had stretched her vagina to an opening of 3 inches before, using that. How big did she need to be able to take King's horse inseminator? Lisa tried to picture King's cock and decided she needed to measure his erection.
Down in the stables, she brought him back to a full erection and wrapped a dressmaker's tape around the tip. It was 3 and a half inches... Only half an inch greater than she had achieved before.
Later, in her bedroom as she was greasing the device with baby oil, her thoughts returned to the huge black cock that awaited her, and the thrill of the task at hand. Spreading herself on her bed, her legs splayed as wide as possible, Lisa started to slowly insert the device into her eager vagina. Stretching past the opening, she gasped as the rounded tip slid through the ring of muscles guarding the inner walls of her vagina and felt the tube ease deeper, with less resistance. She pushed, her thoughts turning back to the pulsing blackness of King's shiny cock hanging tight against his belly. Still further she pressed "him" into her body until the muscles would not allow her further passage. Pausing to measure the diameter, she saw that she was already 2 inches dilated. She knew that each click on the ratchet device expanded her by an eighth of an inch. So, only 12 clicks and she would be able to have sex with a massive stallion horse...
She steadied herself and clicked 4 times without pausing. The fullness she felt was almost too intense. Lisa raised her head and looked between her legs. At the same time she noticed how her clitoris was sticking, the tissues below it stretched lewdly. Almost hesitantly, Lisa ran her fingertip to the hot nub. As soon as she touched her clit she felt the spasming in her belly and the almost painful clenching of the muscles as her pussy tried to contract around the hard device buried ten inches inside her. Lisa almost screamed out loud as wave after wave of pleasure and pain erupted deep within her body. Finally, she pulled a pillow across her face and let loose what would have been a blood curdling scream as the final waves of her orgasm peaked.
Lisa lay panting, astonished by the intensity produced by one little touch. She became acutely aware of the pain deep within her caused by the stretching. Slowly, almost reluctantly, she slid the device from her gaping hole. It made a slurping sound as her stretched cunt walls released the tube. "Tomorrow night it a goes back in and I click at least 8 times... " Lisa promised herself...
She started early the next evening. Lisa readied herself and her goal for action. As she set the already slickened tube on the edge of a wooden chair, she did some deep knee bends to limber up her hips and legs. Lisa was determined to make this work. Stretching on her hip-toes, she inserted the device into herself. The lips of her pussy spreading, and stretching around its initial two-and-a-quarter- inch diameter, Lisa pressed herself downward. One, two, three, four clicks... She felt the pressure build within her. Her perineum and all the surrounding skin pleading for relief. Five... six... "Arrghh!" she wailed, determined to go on. Seven... Lisa's legs began to tremble as she held herself about four inches above the edge of the chair. She took a deep breath pressing downwards. Holding her torso erect, Exhaling slowly, she clicked the device again. It expanded within the depths of her body. "God! at last" she hissed "I did it!"
Supporting herself with her arms, Lisa remained in this position for many minutes, letting the muscles in her cunt and belly adjust to the massive intruder. As the minutes passed she became aware that there was no longer the sharp pressure, almost a painful pressure, but instead an exciting fullness. She kept the posture for nearly ten minutes, until her arms began to shake. Leaning forward, putting her weight on her legs she lifted off the chair. She could waddle across the floor and the huge "cock" didn't fall out, and as she slowly moved to the bed, she set to mind the plan for final night's preparation. She lay on her back in her bed for another half-hour, careful not to succumb to the urge to touch herself. Lisa did not want to repeat the mind-shattering orgasm of last night until she had finished her primary task. She was determined to provide King as well as herself with ample room to accomplish what she had set her mind to do. Lisa was going to have King fuck her, she was going to have that beautiful animal's huge black cock inside her so she could feel the hot, hardness and they could be one. Her mind wandered as she tingled deep inside herself as she thought about King's hot cum jetting in to her belly. As her mind wandered, so did her fingers. She felt the flange of the device and the inch that had slid out as she lay on the bed. Her fingers lightly traced the lips of her cunt, stretched thin by the invader buried deep within her. Lisa pulled the pillow and placed it gently next to her face, and turning her head into it, ran her finger over her straining clit. Just as it had the night before, she erupted into a gut-wrenching, pussy-spasming orgasm with only a single touch on her clit. This time, the pain/pleasure was much more pleasure and only a slight twinge as her well-stretched muscles clamped tightly around the hard shaft. As Lisa reluctantly removed the now familiar intruder from her cunt, she became aware of an emptiness that needed refilling. Only King's dick could properly fill it...
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