She can't withhold it…

Theodore pushed the door open to the biology lab with Ashley following him inside. With the promise that they would be moving on to human reproduction everyone had been on time for this class and they orderly took their places. Bruce already sat in the first row with Rachel on the floor when the rest of the class entered.

Sarah sat naked on top of the teachers desk, stripped of her dog ensamble.

"Good morning. Take your seat, take your seat." The chippery voice of their elderly teacher called out.

Theodore led Ashley to the front in the far off corner of the classroom and tied her leash to the leg of a table. From their place Ashley had a perfect view of the teacher's desk and the classroom door. She was a bit excited learning about this topic, even if she was on advanced birth control that removed all chance and scare of getting pregnant, she had to admit that she knew next to nothing about her own reproductive system.

"There has been a slight change of plans." Mr. Johnsson told the class when they were all in their seats. Their disappointed groans were heard from around the room.

"No no no." The old man's jittery voice reassured them as he waved away their complaints. Ashley thought he had a spring in his step when he walked around the table to stand in front of it and suddenly jumped up to sit on it. He's in an unusually good mood.

"We are still doing reproduction, we're just going to make a more long term side project of it."

What could he mean by that? Ashley was listening intently.

Mr. Johnsson clapped his hands together. "Let's get to it." He jumped off the table and moved up beside Sarah. "Lean back and spread them." He told the redhead teen.

Sarah opened up her legs for the class of students. First Bruce hits her, now she is shown off like this.

"For those that does not yet know, this is the female sexual organ." He gently clapped on Sarah's vagina. Ashley saw her grimace from being touched down there by him. Mr. Johnsson used his fingers to spread her lips open to show the class her most private part. Sarah began to blush and with her arms propping her up she was unable to hide the embarrasment that her face showed. "We will talk more about this later." He let go of her and Sarah immediately closed her legs. "No sweetie, those stay spread open." Mr. Johnsson said as he touched her shoulder. Sarah, who stared straight at her owner in the front row looked frightened. She had **** but to spread them again.

"I want you to take a good look at her. Sarah here is a perfect example of a woman in her fertile prime. Why prime you may ask? Can't a woman get pregnant throughout her whole life? No!" Mr. Johnsson raised his indexfinger, pointing out the folly of such a thought. "They can't and the risk of complications for either woman or the child increases as she ages."

The class was taking notes on the complications that could occur with a late pregnancy, how long a pregnancy would last. How a woman's body changes. Ashley found it fascinating that even the skeletal structure could change from it. They also went through what happens when a man ejaculates in the woman and what happens once the sperm reaches the egg. While it was interesting, Ashley started finding it hard to concentrate with Danielle on her mind and how she would try to get it on with Theodore later. I have to find something that I can do against that. I could try talking to her. Make her understand that Theo is mine. But I can’t do that with him around. In order for her to speak to Danielle alone she would have to be let loose of her leash. She didn't want that either.

A hand shot up from the class.

"Yes Isabel." The blonde haired petite woman lowered her hand. A sigh went through the air from students that had an idea of what level the question that was to come would be on. "So, a woman gets pregnant and has to carry that spawn around for nine months and he can just fuck off the second he is done and impregnate another woman?!"

"I wouldn't put it that crass, but yes. That is technically correct."

"Then, what's stopping, say, a very charming man from impregnating everyone? That would stop anyone else from reproducing!"

All my instincts say I should withhold sex from him if he even thinks about being with someone else. But, Theo is my owner! I can’t withhold it when he demands to use me for his pleasure. Ashley's mind conjured pictures of Theodore ordering her to present her holes and spread her cheeks for him to enter her. In her mind Ashley did not even think of disobeying her master's commands. Her fantasy made her let out a groan yearning.

All the boys began laughing at Isabel’s question.

"No, no. Don't laugh. There are no bad questions. To answer Isabel's question I feel it is my duty to say that even the most virile of men can only go so many times. I think humanity is safe from this dreamboat of yours.

Men can only go so many times… I can't withhold sex from Theo, but…

Ashley spun round on her spot and crawled in under the table Theodore sat at. Without hesitation she took the zipper in her teeth and yanked it down and began digging out his flaccid cock. Ashley slurped it into her mouth and worked to get him hard and Theodore's limb responded in haste, forcing her mouth wide open. He parted his legs so that his bitch would get better access. Ashley placed her hands on her knees, working only with her head.

*Glugg*

*Glugg*

*Slurp*

*Glugg*

*Slurp*

*Gag*

*Slurp*

Ashley enthusiastically worked to please her master's cock. The glugging, **** and slurping sound of her taking care of Theodore made all the other students look over to him. I can't withhold sex from my owner, but I can shower him in it. Spoil him to no end untill he can't go another round with me, or anyone else.

Theodore shrugged then leaned back with his hands behind his head. "My bitch didn't have breakfast. She's hungry."

Ashley didn't care that he just doubled down on her being a cum hungry slut. She had work to do and she needed him to finish before they were done here. She couldn't afford an interruption before that since she didn't know how many times Theodore had in him. But he needed to be completely drained before Danielle came calling to pay for his favour. Ashley felt Theodore tense up, so soon Theo? Confident that she could make him finish at any moment she slowed down to a gentle sensual rhythm to keep him going a while longer. His heavy breathing and sounds of pleasure when she sucked on him were intoxicating. Does that feel good Master? Since she was already down here, she may as well enjoy herself while listening to the lecture, savouring the taste of him.

"Uuuughh, you're such a good bitch Ashley." She heard Theodore groan from above the table. That she could give her owner so much pleasure by taking his meaty dick in her mouth made Ashley feel incredibly important in that moment. God I love his cock. Slurping on his cock she spit on it to lube it even more, moaning around it when she struggled to take him in again to worship it. Ashley was loving the feeling of his thick member in her mouth and was thoroughly convinced that nobody else could take care of Theodore the way she could. Swirling her pink tongue around its head to lick up the beads of precum leaking from him she felt him tremble with excitement. Mmmmm, your cock tastes so good Theo.

"Hello." Mr. Johnsson clapped to get their attention. "Focus. Theodore is simply feeding the bitch. It's perfectly natural."

The class murmured.

"We have talked a little about the differences between men and women." Mr. Johnnson drew down his pants to reveal that he was not wearing any underwear, his wrinkly cock hanging limp between his slender legs. Once again their teacher moved up beside Sarah and spread her pussy lips open for the class with one hand. With the other he first pointed to the little nub at the top. “This here is an important part if you want to focus on her pleasure.” He said and began to gently rub on the bud. "It's called the clitoris, or clit in layman's terms." Sarah’s contorted face softened and was replaced with a softly moaning one. “As you can see, a woman’s vagina is naturally moist, but once the woman experiences arousal her bartholin glands will secret additional fluid to ready herself for sexual intercourse."

Another hand shot up among the students and the teacher gave him the word.

"How long is this project going to last?" The boy asked and sniggered knowingly.

"That all depends on when it takes Michael." Mr. Johnsson answered and went back to describing the different parts of Sarah's vagina. His own cock steadily grew stiffer from touching the teen girl.

"If you look at me, you can see the male organ responding to the female form. It is not a muscle that causes the stiffness, but rather blood filling the corpus cavernosum." The students jutted down the latin words in their notebooks. Anything non-english was bound to come up on a test. "The male penis becomes rigid to enable him to penetrate the woman and plant his seed in her."

"Lay down on the table here sweetie." Mr. Johnsson gestured for Sarah to lay down along the table length, then went to stand by the short side, placing himself in between her legs and lay his stiff cock on top of her.

"Before class Sarah received a hormone shot to increase the chances of conception.”

“What!” Sarah bellowed from her lying position.

“Shush girl!” Mr. Johnsson traced the lithe body of the teen girl down from the stiff nipples of her small breasts to her nether region where I stroked her to elicit further lubrication. He grasped the base of his cock, letting it slide against her skin as he pulled back and then aligned it with Sarah's opening. "I am now going to enter Sarah with my penis and perform intercourse until completion in order to deposit my seed in her."

"But you said old age could cause complications!" A girl blurted out in distraught.

"That's the beauty of it. Men don't have that age restriction."

He turned to face Sarah who laid helpless on the table. "Lets put a baby in you shall we, sweetie." Then he pushed himself inside her. Sarah's moist lips welcomed him against her own will. Her inner warmth made his already stiff cock even more rigid.

"No! Please I don't want this. Please. Stop." She was begging him. "I don't want to be pregnant!" Her arms started flailing up against him but her teacher caught them and pinned them down by her side. Sarah began sobbing when Mr. Johnsson started thrusting into her. She moved with every thrust of the old man, her perky small breasts bouncing on her lithe body. "Please, I just wanted to be with Bruce! I don't want to be a **** any more. I don't want a baby with you!" Tears were streaming down her otherwise cute freckled face.

Grunting her old teacher continued to fuck the teen in front of his students. Not caring at all to stimulate her in other ways like fondling her breasts or kissing her. "Quiet, you have no say in this, ****!" Mr. Johnsson told her sternly as he continued to pump in and out of her tight hole. Among the students were those that were visably upset by what they saw, but knew not to interfere with the allowed use of a ****. Sarah's complaining eventually died down when nobody came to her help, nor listened to her pleas. She lay motionless as her teacher ploughed her.

Ashley sat with Theodore's cock in her mouth, gently pleasing him as she listened to the sound of one of her favorite teachers fucking a former student of his. Is he really going to put a baby in her. Listening in on his grunting she could hear that he was getting closer. That's my queue. She went back to work with the intention of making her master finish, going down deep and **** on his massive cock only to come up and rapidly impaling her head on his thick rod. His stiffness soon began twitching and pumping his thick load into her wanting mouth. Ashley swallowed down all the initial spurts like the good little cum slut that Theodore wanted her to be. Ashley felt dirty sitting on her knees under the table and letting her owner fill up her mouth with his cum. Yet, she could appreciate the beauty in Theodore wanting to reward her for her dedication to her duties as his ****. Seeing it as her owner's reward to her made Ashley let the last two spurts of his ejaculate rest on her tounge to savour what her master had given her for a job well done, before swallowing them down too.

"Uuuuuuuggghhhhh." Mr. Johnsson groaned loudly when he finally reached climax, pumping the little redhead full of his semen he almost fell on top of her in exhaustion. "Phew, I almost forgot how good teen pussy was." He said while he let himself shrink in her. From under the table he took out a pillow and elevated Sarah's lower body with it. Sarah, completely broken by that time, did nothing to fight against him when he lifted her behind up to put the pillow under her, her fighting spirit gone. "Hopefully next time Sarah will be pregnant, otherwise we will continue this until her results come back positive."

Their teacher backed off from the deadpan girl laying on the table.

"Since we can not expect you to participate in this project on a physical level, we will be doing another side project that relates to human reproduction as well. Boys to that side and ladies to the other one please.”

That was close, good thing I finished. Ashley thought as Theodore rose and put his dick back into his pants. Ashley crawled out from under the table and sat down in the sit position.

Mr. Johnsson put his pants back on and gave all the girls a number, then all the boys one. "Go find your partner for this assignment."

Great… Another girl Theo is going to have to spend time with.