AN EROTIC STORY HOSTED BY IMPREGNORIUM.NET

With apologies to lust4life - the scenario in which 'initiation' is set is too 'fertile' a story ground to ignore.

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Mark sat watching as his elder sister Gemma waited in line for her first pairing, his turn would come next year. He was jealous, he wanted Gemma for himself but the Genetic Match Organisation (GMO) had chosen her 'first mate' and everyone knew soon she would be in the gymnasium with the other young people frantically mating for the first time with the aim of making babies. Mark sat with his Mother and Father, his younger brother and sisters were at home with his grandmother but as his turn would be next he was allowed to watch what would be coming to him. His was an unusual family, after he had impregnated his mother his father had stayed with her, they had fallen in love. They both still followed the dictates of the GMO and went off to mate with the partners chosen for them for procreation but whenever his mother was pregnant his father was who she stayed with. This made for a very close family, Gemma of course was Mark's half sister - he did not know who her father was - and all his other siblings were half siblings as well. At least that was what the GMO thought but Mark had his doubts he was sure that at least two maybe more of his younger siblings were in fact his full siblings without anyone being any the wiser.

Mark and Gemma had always been close though in the last few months in the lead up to her first pairing she had become more distant, she was becoming an adult and did not want to be seen to be too close to her younger brother. Until this time the pair had had a sex life of a sort, no fucking but ever since his 13th birthday, when Gemma was 14, they had taken the time to explore each others bodies and masturbate together. She had been well indoctrinated about the need for the GMO at school and would not risk getting pregnant before her first pairing. Gemma did not know when she was fertile, as far as she was concerned it was all the time, the GMO had suppressed knowledge of when women ovulate as they did not need to know and if they did they might try to use it to avoid getting pregnant and that would just not do. Gemma therefore was too scared to let Mark close now she was so near to her initiation it did not mean she did not love him any more she told him. She had made him a promise, when she was pregnant and allowed by the rules to fuck with anyone she would let him fuck her then. He would not face his 'first pairing' a virgin but an experienced lover. He could not wait he wanted her pregnant quickly so that the mate chosen for her would leave and give him his chance to fuck her. The pairing continued two by two and then it was Gemma's turn, the GMO had chosen Stuart for her. Mark thought he was a bit of a nerd not the best of the bunch he hoped he did not hurt his sister in his over eager attempt to get her pregnant. Actually she might have a hard time with Stuart he thought again as he saw them together, most of the boys on the stage had hard erections whilst Stuart's cock hung limp, Gemma would have her work cut out in a few minutes time. Gemma's next period was due shortly and he hoped she did not have it then everyone would know Stuart had actually done his job and he Mark could have his chance with his sister.

Wind back a few weeks: Mark was disappointed that Gemma had spurned his advances, the promise of a fuck after she was pregnant was just not enough, she was always in his masturbation fantasy and he dreamed of getting her pregnant. Unlike his sister Mark did know when women were fertile, two weeks before the start of their period. He had found an old book amongst his father's things and it gave details that the GMO had suppressed. It talked about birth control, how to prevent and how to encourage pregnancy. Knowing she had promised him a fuck once she became pregnant Mark wanted to now when it was likely to happen. He got a diary and charted her periods in secret, he would know when she was fertile even if she did not and he might be able to make sure she got pregnant in her first cycle then he would only have a few weeks to wait. It was a good plan so Mark was careful to get his calculations right, not that that was much of a problem for him, like his dad he was good at maths. Mark thought for a minute was that why some of his siblings were so like him, had his dad used the book to make sure it was he who got his mother pregnant not the person chosen by the GMO. Was the book left where he would find it so he too could play his part in the family deception? When his mum had left for a 'holiday' before she became pregnant with Jane and also with Stevie she had only been gone for two weeks. Did mum and dad use the “rhythm method” he had read about in the book to have sex between pregnancies without being seen to be breaking the GMO rules? Had dad used the book to get her pregnant just before she went to her GMO lover? Come to think about it when mum was on 'holiday' before Carrie she had been away for three months but came back for a couple of weekends because 'one or other of the children was sick'. Jane, Stevie and Carrrie looked very much like him and it confirmed his suspicions, they were dad's children and his full siblings not as recorded by the GMO. Mum and Dad had been careful to make it look right and some of the other children were almost certainly not dad's so no one at the GMO would get suspicious - cunning he thought.

When the day of the pairing was announced Mark checked his dairy and was shocked, Gemma was due to ovulate a few days before the pairing so he would have at least a six weeks wait after the pairing, he was heartbroken. That night her watched Gemma as she slept and could not help himself, he stood by her bed an masturbated jetting a huge load over her and her bed clothes. Over the next few days it became a habit he would wait until she was asleep then he would masturbate over her. Gradually he became more bold and moved her clothing so he could see her body as he rubbed his cock. She was a heavy sleeper but even if she did wake he would just tell her he was remembering their mutual masturbation sessions, he knew he could make her understand without becoming suspicious. One day he decided to stroke her pussy, it made his cock even harder the smell of a ripe pussy turned his hormones into overdrive and that night he shot a very heavy load over her sleeping body some of it landing on her pussy. He had to clear it up because she might not understand going this far so he bent down and licked his cum gently from her sleeping body. As he licked her pussy she stirred and he thought she might wake but she did not - he continued and the sounds coming from his sleeping sister suggested she was having a good dream so he continued to lick her and really enjoyed it as much as she seemed to be doing in her sleep. The next morning Gemma told him she had had a dream that was having sex at the initiation, Mark asked her if it made her feel sexy and asked if the could have a mutual masturbation session but she said no. Do not worry little brother she said in a month or two we will be able to get together properly. He accepted her statement and said no more, at least he had not been caught out.

Over the next few nights he got even more adventurous always licking his sisters pussy before coming over it then licking the come off. She never woke up but as before seemed to be having some good dreams, she did not talk about them again but Mark was sure she was having orgasm is her sleep. Gemma always slept so soundly Mark made a decision, just before the pairing, when his dairy showed that Gemma would be fertile he would actually come in her. He pussy was nice and wet and with all her masturbation she had long ago lost her hymen so it should be easy to get in. He would not risk actually fucking her so he would get her going and himself as well. When he was close to cumming he would slip in for a few strokes and cum inside her. He would then pull out and lick her again to give her an orgasm - dad's book suggested that if the woman had an orgasm she was more likely to get pregnant.

The day arrived, the book said sperm would live a few days and were best when they were waiting for ovulation. Mark's chart showed that Gemma would ovulate in the next three or four days with another two days until the pairing was due. If Mark could get her pregnant now it was so close no one would suspect she had not got pregnant at the pairing, she would only be with her partner for two weeks and he would get his chance to fuck her properly. Mark was so excited he almost came to quickly but he manage to hold off and climbed up from licking his sister's pussy and rubbed his cock along her slit. He found the entrance and slid in, he was not expecting the glorious feeling it was hot and wet and smooth, it gripped his cock and he felt like he was in heaven. He pulled out and then pushed back in again and knew that this is what he wanted to do, to fuck his sister on every conceivable occasion. He had timed it well and was to some extent disappointed when he felt his sperm shooting out of his cock into her fertile pussy. He enjoyed the sensation but cumming meant he had to pull out and end this joyous time - still soon he would be able to do it for real. He was soon down between her legs licking off the sperm that leaked from her, but taking time to make sure he made her cum - the plan was working.

The next day Mark decided not to risk another go, he did not want to get caught and that morning has sister had said she must have had a good dream as she felt all wet. Wait for a day he thought, it would also give him time to build up more sperm for a second attempt just before she was due to ovulate.

Gemma loved her brother she would really like him to be the father of her children but she could not take the risk. The GMO used first pairings to check on the fertility of both the boy and the girl. Later on for her babies she would know who the father was to be in advance and have time to check but first pairings were always a surprise on the day. Unfortunately she had two black boys in her class so she could not take a risk with Mark, if she let him she knew Mark would get her pregnant but if she got a Back boy as her first pairing and produced a white baby the family secret would be out - she could not take the risk for mum and dad's sake. Gemma knew about the family secret, her mother had told her a year ago when she started in the initiation class. Jane, Stevie and Carrie were are dad's children as well as Mark, they would have liked more together but could not take the risk of getting caught. Mum and Dad knew when she was fertile and had planed carefully. When they found out that the fathers planned for the Jane and Stevie pregnancies were of a similar type to dad they had taken the risk. They gave the GMO false dates for Mums periods then made sure dad got her pregnant just before she went on her 'holiday'. Most couples took at least a couple of months to achieve a pregnancy, too many 'first times' would just be too suspicious. Carrie was different mum had intended to go along with the GMO but the man they chose for her was a jerk. He had a couple of children but always took a long time getting the women pregnant, the GMO must have thought with two 'first times' mum might be the one to get a baby out of him more quickly. It turned out he was not really interested in women. When not on GMO duty he preferred to spend his time with men. This meant that he did not spend all the time with mum trying to get her pregnant, he would just do what he thought was needed of him often enough not to arouse too much suspicion and hope he would get her pregnant so he could get back to his chums. Mum worked it out and talked to dad about it, she did not want to have to spend half a year or more with him. They devised a plan so that mum could get some real sperm at the right time. The children would fall sick and want their mum, the jerk would not care if she went away for a few days more chance to get back to his male friends. So it was not too obvious they planned four trips back to the children with the third coinciding with when mum was due to ovulate. Dad would get her pregnant that weekend and she would go back and make sure the jerk fucked her a few days later. She would stay with him a further month before announcing her pregnancy and then get back to dad. It had been a risk but it had worked.

The family secret was the reason she could not risk being too close to Mark she knew that as the day of the pairing drew close he would want to fuck her and use the excuse that it was just before so did not matter. She knew better so, hard as it was, she resolved to keep away from their fun games for a few months. It would be over soon enough and they could take their fun to a new level, really fucking! It did not help that she shared a bedroom with Mark but she managed to turn him down and make it sound good with only a short wait with a promise at the end. When the date of the pairing was finally announced she started having really hot dreams. After the first dream she was concerned that it might be Mark but when she told him he did not respond in a guilty way so she thought she must be wrong. The dreams were certainly good, perhaps it was her mind preparing her for the initiation. Then just five days before the initiation she woke feeling wet. She had had a very intense dream perhaps that was the reason but it did seem odd she had not been that wet before. She commented to Mark and again he was non committal. When the next night she did not dream at all her suspicions were arroused, was it Mark after all and had telling him scared him off? She resolved to try and stay awake tonight and see what happened.

Mark just had to try again, he might have got Gemma pregnant two nights ago but according to his diary tonight was his best chance. He waited anxiously for her to fall asleep then went over to her bed and continued as before. He moved her clothes aside gazed on her perfect pussy, soon he thought his baby would be coming out through here - but first he has to get inside. He licked her pussy and she groaned, was she asleep she seemed to be responding a bit more than two nights ago. No it seemed she was asleep so reassured he continued. Gemma meanwhile felt his tongue on her pussy for the first time, so this was the reason for her dreams for her being wet. It felt great why had they not done this before in their masturbation sessions quickly she became super aroused she knew an orgasm was just around the corner when suddenly he stopped, why, she needed release please start again she thought but kept quiet not wanting him to know she was awake.

Mark had really enjoyed fucking Gemma two nights ago but just a few strokes was not enough, tonight he would get in her sooner and make it last, she had never woken up so he would take the risk, he slid up over her and put his rampant cock against her entrance, as before it slid in easily and the sensation was heavenly. He started to stoke in and out, this was the real thing it was great the fact that he was trying to get her pregnant made it even better.

Gemma felt him move and wondered what was happening. Something brushed against her pussy and it did not feel like his tongue, suddenly it was pushed inside and then as quickly pulled out only to go back in again. Oh no she thought he is fucking me what shall I do now, whilst her pussy felt full and complete, perhaps she could wait a while before stopping this she was very close and would come soon. Discretion got the better of her, she could not risk him cumming in her and getting her pregnant so she made like she was waking up, perhaps he would pull out.

As Gemma stretched below him in the way he knew she did just before waking Mark froze, was he about to be caught out. When she did not seem to wake fully his cock got the better of him and he started thrusting again. Gemma realising that he was not going to stop 'woke up' and said what are you doing. Sorry he said caught out I just could not wait, I had to have you before whoever gets you at the pairing. But what if I get pregnant she replied, couldn't you wait just a few weeks. No sis he said all the time thrusting in and out of her pussy, anyway if you get pregnant they will just put it down to a 'first time' at the pairing. But what if I get Jason or Edward she asked. Oh he said I never thought about that realising she had just named the two black boys in her class. Should I stop he said. Did you cum in me two nights ago Gemma asked, caught out he could not lie and admitted his crime. Well it may be too late already and I am very very close she said so you can continue until you make me cum then pull out - you have already had your own pleasure after all so now I deserve mine. Yes he said sheepishly, he knew it would be difficult to pull out but he would try. He started to fuck her properly and the both moaned as they enjoyed their deliberate time together. I'm cumming she said and held him tight as her pussy squeezed his cock. It was all it took to send him over the edge as well and he had no chance to pull out firing pulse after pulse of hot sperm at her cervix.

Damn that was good they both agreed afterward and both hoped that either Gemma was not pregnant from this time or that if she was she got a white boy at the pairing in two days time. We will definitely start this again in a few weeks little brother Gemma said but remember from next week you have to move out of the room to allow my partner in until I fall pregnant. I hope that is not too long he said it will be hard waiting.

Back at the pairing Gemma and Stuart walked off with the others into the gymnasium to complete their first coupling in the facilities provided there. Gemma looking at Stuart's limp cock hoped the sounds of other couples fucking would get him up, why did she have to get a difficult one? Actually her mother had warned her last night she might. As the daughter of a three time 'first timer' the GMO might expect her to fall pregnant easily and pair her with difficult case. Three times she had asked her mother, you told me about Jane and Stevie, and of course Carrie but the GMO do not think she is a first timer so why three? You of course her mother answered. Your genetic father was a quick shooter no sooner than he was in me in the gym than he dumped his sperm inside. I never got a chance to get going. After that back at grandma's house he was no better, the first few times he tried he came before he even got inside. I did get one decent fuck out of him by getting him to come first and then sucking his cock to get it hard again, but even then he could not stay anything like as long as dad can. I must have fallen pregnant that first time in the gym and I was glad to get rid of him that is why you never hear anything about my first time. When for my second mating I was assigned dad everything was different. He took his time and made sure he pleased me, I fell in love and so even after Mark had been conceived we stayed together and we have been together ever since.

Remembering what her mother had told her about her own experiences did not help Gemma now. She needed to coax Stuart to dump his sperm in her so she could claim to have his baby. How would she do it? Mum had talked about sucking cock something some men like but which does not lead to babies because the sperm does not get where it is needed. But it might be a way to get him interested and then get him to fuck her once he had an erection. As soon as they were in their private booth however things started to improve, it seemed he was shy and being out of sight of everybody else his cock started to rise a bit. Gemma gave him a hug and a kiss and helped him along with he hand. Stuart she said I have been waiting a long time for my first time shall we see if we can make a baby. I want to he said but I am embarrassed I do not know what to do. But you attended the classes didn't you Gemma said, yes some of them he replied but I never really understood it. Something about my penis having to go inside the girl but it is too small surely and it bends so how can it go in. It needs to get hard first Gemma explained, oh he said mummy never let me get hard she said it was naughty. Well it is not naughty now Gemma said the GMO require it of you, what do you think of my body. I haven't really been looking its rude he said. Not when we are supposed to make a baby she explained here look at my breasts that will feed my babies. Here feel my vulva (since he had called his cock a penis she thought he would be more comfortable with the proper terms). You penis goes in here, you deposit some of your sperm then after a while a baby comes out the way you put it in. As she explained and he watched her body his erection appeared and she urged him to put it in before the moment was lost. He slid in and gasped, oh that feels wonderful he said and with that he came shooting sperm into her. Oh I’m sorry he said I could not help it I seem to be peeing in you. No she said that is not pee its your sperm on its way to try and make a baby. He was going to be hard work and the chance of her own relief was nil - but at least she had his sperm in her so if she turned up pregnant buy her brother she could tell everyone it was Stuart's baby.

Two weeks later her period failed to arrive and she was officially a first timer. When it was confirmed Stuart left the house, he was still embarrassed by the whole process. He had tried a couple more times and given her sperm each time but it was still hard work. Pity the poor girl who gets him for his second baby. Mark moved back into his room and their parents provided them with a bigger bed. They knew what was going on so they might as well be comfortable.