The Twins - Cover

The Twins

Copyright© 2001 by Martina2023

Chapter 11

Incest Sex Story: Chapter 11 - 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  

On Friday evening she packed her bags for the next day. Looking at herself in the mirror she noticed a patch of downy hair growing on her tummy and the top of her arms. Was she growing fur she wondered. Her body had become hour glass shaped. Her huge bust then her slim waist followed by an enormous backside. Lisa constantly stroked her buttocks. She noticed as well her preponderance for doggie style sex with Joe. Like animals do? she thought.

Joe drove her to her 'sugar daddy' as he jokingly called the vet. If only you knew thought Lisa... Dr Milton greeted her at the door by throwing his arms around her. He admitted later that he was frightened that she would back out of the deal and wouldn't return. Taking her to his treatment room he checked her pulse and blood pressure. A rapid fire question and answer session followed. Did she feel OK? Were there any side effects? Had she gained weight? Lisa told him she had but assured him that she felt fine. Then he said, "Are you prepared for the next stage?"

Lisa drew breath and said, "Yes."

He lead her to the treatment bench. Her legs could hardly carry her, the anticipation was so great. He said "If you're ready, I need you to remove your lower underwear and lie on the examination table."

Lisa stepped out of her panties, gathering them up quickly so that he didn't see the wet stain in her gusset. Lying back she waited for the doctor. "Lisa, will you bear with me whilst I prime the machine. I need to load the eggs into the chamber and set the temperature and quantity of feline cells to be sprayed into you." The machine whirred into life. He punched in the required data to program the machine. Then he went and got the steel canister containing the cat foetuses. She watched him load three straws into the ports at the front. Lisa almost passed out in expectancy.

He wheeled the machine to her side. She looked at the wires and tubes dangling from every angle. The largest tube had a stainless steel bullet like object with a plastic tube at the end. She guessed where that was going... He explained that it also had a camera at the end to assist insertion into the cervix. Asking her to bend her knees, he gently lifted each leg into stirrups which he brought up from below the examination table. Then he strapped her ankles firmly into them and pressed a small button which operated a motor which pushed her feet back towards her. It had the effect of forcibly splaying her knees while at the same time the examination table tilted her bottom towards the ceiling. She looked down at herself. Completely helpless, she saw how her vaginal lips had parted to allow access to her lower body.

Apologising for her less than flattering position he took up the steel probe. "I need to insert this directly into your womb. Once it is in position, I will activate the motor and it will deliver the eggs and the cultured animal cells. Shall we continue?"

Lisa tried to answer but all that she could utter was "Yeeeh."

Parting her vulva with his fingers he positioned the probe and pushed and screwed it into her abdomen. She felt it touch her cervix and watching on a television monitor she saw him operate a small joy stick to direct the insemination tube into her uterus. The screen showed that the small optic fibre like tube was now deeply inside her body. "Ready?" he asked. She nodded and watched him press a green button on the control pad. The machine kicked into life and the hydraulic hoses jerked as the pump pulsed about a quarter of a pint of fluid deep into her womb. Lisa arched her back as she orgasmed. The doctor tried to hold her down on the examination table with the palm of his hand on her stomach. He smiled and realised for the first time why she was so keen to help his research...

He waited as Lisa finished convulsing and then asked her to stay in that position for a while. "Once I withdraw the probe, I need to insert a small cap into your vagina and over your cervix to seal in the contents. We mustn't let the fluid leak from your body." She felt a slight 'dragging' sensation as the probe was removed and he pushed a rubber cap into her. She was sealed with three fertilised cats eggs inside her. "Now only nature can help." He said. " Time will tell whether you've taken."

Lunch was served and the doctor asked her if she wanted to go shopping for food and supplies or would she rather stay at the house that afternoon. Lisa asked if she could stay and walk the dogs. Dr Milton was delighted, "they are both getting fat, they could do with some exercise." he beamed.

Telling Lisa that he and his housekeeper would be about three hours, they drove to town in his LandRover. Lisa went behind the house to the outhouses. Opening the side door she was nearly knocked over by the excited Labradors. She loved Labrador dogs and Ted and Nancy were delightfully friendly animals. Licking her face when she bent down, they bounded about happy to see her. She took them into some woods behind the house throwing sticks for them to retrieve. She realised that she had never been happier. She felt she would like to live here for the rest of her life.

After about half an hour she returned to the barn. She had noticed that Ted was interested in her. Constantly sniffing her crotch, she was always having to push him away. She sat on a hay bale and he tried to bury his nose up her skirt. Lisa realised that he could smell the animal culture in her body. Taking him by both front paws she saw his penis was out of its furry sheath. Kissing his nose she giggled and said, "Are you getting randy with little Lisa?"

He obviously was, and curious, she knelt beside him and reached around his back and held his erect penis. It was like hard dry rubber, and looked completely different compared to a male human. Instead of having a foreskin like a human, it's entire shape was like the tip of the human male. It was reddish, and very sensitive to her touches. She noticed the lack of a foreskin. Instead of having the so familiar and sensitive 'mushroom', like a human, it was pointy at the tip, then growing larger after an inch or so.

Ted was panting and trying to get behind her, to her lower regions. Lisa wondered if dogs could have sex with humans. They are probably to small to get it in she thought. She stopped fending him of and waited to see what he would do. Instantly he got behind her and reared up on his hind legs and started to hump her back. Bemused she got on all fours and he adjusted his legs and thrust at her. She realised he knew what to do and checked her watch. They were due back in just over an hour...

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