My wife came back from her sister's telling me that Joan was very unhappy. Her and her husband Simon had been trying for a long time for a baby. They had ended with 3 rounds of IVF treatment to no avail. Simon was not firing on all cylinders and his count was so low that even after many collections from him they had not managed to fertilize many eggs, and those they did, would not take when implanted. My wife was sad for them and told me that she wish there was something we could do for them. Joan was a good looking woman and I was never quite sure how Simon had caught and married her. Simon is a bit of a wimp. I had gone out with Joan a few times before changing stream and settling for her sister. We had never got past some light petting. Two nights later, my wife and I were out with Joan and Simon. Joan was telling it that they were considering a sperm donor to get around their problem. My wife asked her about it saying she would not be happy to have just anyone's sperm inseminated in her. Joan pointed out that there was no way they could afford any more IVF and the doctors suggest that it would be throwing money away. My wife insisted there must be another way. That night in bed my wife wanted to talk about it and while discussing the options she suggested that what they needed was a surrogate husband. I joke that I would give her one. My wife glared at me. I pointed out her sister was a good looking woman, not as good as you I added, to make sure I was not in the dog house. shortly after I was asleep. I must admit I did dream of Joan and impregnating her. No more was spoken for several days, then out of the blue my wife said, "You could do it." "Do what," I asked. "Give Joan a baby," she replied. "you want me to fuck your sister." I asked. "Well not exactly, you could do it in a cup and Simon could use a baster and squirt it into Joan," she informed me. Not my idea of making babies but I supposed that it should work. A week or so later I was dispatched to her sister's to wank into a cup. Having deposited quite a wad. Simon put it into a baster and disappeared into another room to pump it into Joan. We did this three times over three days at her most fertile time. Long story short it didn't work. I pointed out to my wife that the man usually deposits it five or more inches inside the woman. The baster they had was only going to put it in about two inches. She asked me what the solution was. I told her that they needed something to push the sperm in further, or the donor pump it in her au-naturel. She slapped me on the arm and joked that I just wanted to shag her sister. Not a bad answer I told her. I received another slap. A few weeks later still I was back at Joan's. Her and Simon had agreed with my wife that I was to wank one of with my wad sprayed into Joan's open fanny and Simon had a dildo that he intended to ram it home with. I enjoyed my bit, looking at Joan,s cunt as she held it open waiting for my spunk. I dropped my load straight in and Simon pushed the dildo fully home in Joan's fanny. I zipped up and then left. We repeated this twice more in the two following days. My wife joked that I would have enjoyed carrying out my task. It still didn't work. This time they wanted my cock to almost touch Joan's fanny when I dropped my load. We got into position and I was wanking away. Just as I was about to shoot my load I moved forward to get closer. Joan must have had the same idea as she also moved towards me. The two movements resulting in the head of my cock just about penetrating Joan's fanny. I stayed still as I blew my load. withdrawing Simon stepped forward and thrust the dildo in deep. Again I zipped up and left. The following night Simon was not able to be there, as he was away on a tree day training course, but we still went through the process and again my cock just penetrated Joan's fanny. Joan had the dildo ready and thrust it into herself. The next night I was between Joan's legs looking into her open gash. She told me to, "do it." So I did, I thrust forward without wanking and just penetrated her pushing over halfway inside. Joan gasped, "your not meant to put it in." I asked, "do you want to get pregnant?" to which she said she did. I told her that I had wanted this ever since I first met her. With that I fucked her silly for that next twenty minutes giving her my load delivered naturally. A moth later I was told that it was successful and the test proved positive and that she was off to the doctors for confirmation. It was confirmed and 9 months later she had a baby boy. That is where you would think things end. No thirteen months later she wanted to give the boy a sibling. I was called on to do my thing. I was back between Joan's legs depositing my load just inside her fanny. The second day she came around during the day. My wife was out. Joan's hands were on my cock and she was insisting that I fuck her properly as I had before. I quickly had her stripped and laid on my bed. I climbed on the bed having stripped myself and diving between her legs head first. I gave her a good licking. She moaned and groaned until she pleaded with me to fuck her. I didn't need much persuasion. I pumped her fanny for as long as I could before flooding her womb. We were dressed and had straightened the bedroom and sprayed some fresh air spray around before my wife returned home. Joan told her that she would like me to come a little later this evening to try to inseminate her. That evening I dropped another load just inside Joan's hungry pussy. Simon did his bit with the dildo. The following day I had a day off and spent most of it in Joan's spare room fucking her silly. That evening I had to perform again in front of Simon. Success, Joan was pregnant again this time with a girl. Neither my wife or Simon never knew that I had fucked Joan. Simon thought just the head inside Joan's fanny lips had done the deed. That was 18 months ago. I have just heard that Joan would like a third child. AH well no rest for the wicked.