When we were trying to get pregnant and couldn’t my wife asked her sister to be a surrogate for us. As we had used up all of our insurance coverage doing various fertility treatments before deciding it wasn’t going to happen, and since we are 200 miles from any big city we decided natural impregnation would be the most effective and cheapest option for us. This meant I had to f*** my wife’s hot younger sister at least once daily during her most fertile days and probably a few more times to give it the best chance of working. We fucked twice a day for 4 or 5 days and then at least once a day after that for another week or so that first month, no pregnancy. We all decided maybe she stopped her birth control pills too close to the first time. The next month same routine. Her and I were f****** and f****** and f****** every chance we got. We were both loving it too, my wife said I was to make sure she orgasmed before I dumped my load in her because it helps the sperm get into the egg. I ate that p**** and filled her with so much c** she looked like she was hit by a mayonnaise truck. For the next 5 straight months we kept at it, and no pregnancy. We decided to quit trying and resigned ourselves to the fact we would only have our son and that was enough, even though we really really wanted a daughter too. Well wouldn’t you know, a few months of not trying with my sister in law anymore and my wife and I screwing just for fun like normal and she managed to get pregnant, and we had a little girl.
I still miss those days and nights f****** the s*** out of my hot h**** sister in law all while my wife was in the next room and totally fine with it. Sometimes she would ask about all the stuff we did and the story telling would get us both hot and bothered and we would f*** like wild animals. I’m sure her sister never told her, and I know I didn’t tell her that the reason she never got pregnant was because when she went off her pills she put in an IUD, she knew she’d never get pregnant but she knew I wanted to f*** her for years and apparently felt the same way. I guess what big sister don’t know won’t hurt her… I wonder if she’d let me nail her sister now once in a while for old times sake…