My Sister in Law

This is a story of how I got my sister-in-law pregnant, not once, but twice.

I'm Mike. My wife Karen and I have three young kids under 5 years old. To say life is busy is an understatement. My wife's sister Rachel and her husband David, have a 9-month-old girl named Becky. Becky is the splitting image of her mother Rachel. She is also my daughter. The only people on the planet who know that Becky is mine is my sister-in-law Rachel, her husband David and me.

David and I have been playing golf each Sunday morning now for a few years. It' s our down time away from our busy jobs. I am a Lawyer at a small firm in town. It has become busier lately as I made partner last year and my clients are demanding. David is also a professional having made partner recently at a mid-sized accounting firm. We love our Sunday morning escape, but we pay for it on Sunday afternoon when my wife Karen and her sister Rachel, go to the beautician for their weekly massage and manicure. David and I do not mind really, but four kids under five is bedlam at times.

It was during a round of golf that David mentioned the fact that he and Rachel had been trying for 6 months to have their second child. While medically able to have children together, they have not managed to do that, hence why I became the father of their first child. During a round of golf, David asked me again. He said quite simply, Mike, can you please get Rachel pregnant again. It would complete our family and we would be forever grateful to you.

If I am being honest, when I got Rachel pregnant the last time, I panicked, as David and I look vastly different, and my son Harry is the splitting image of me. You can imagine how relieved I was when David confided in me their first born was going to be a girl. The thought of getting Rachel pregnant again, and the thought of her birthing a son that looked exactly like me, scared me witless. My wife and I have a girl and two boys, so I figure I could easily sire another boy with my sister-in-law. I talked to David about this, and he said I was over thinking things. Please he said, please make our family complete Mike.

I must admit it was nice fucking Rachel last time and cumming deeply inside her. I had thought of that moment many times and even close my eyes imagining fucking her again while I am fucking my own wife, Karen. I did also wonder whether the birth of Becky had loosened her up down there. She still looked great in her bikini. I knew I would have no trouble getting hard that is for sure. Rachel was a good-looking lady with a perfect figure. I also did wonder, if half the reason David wanted me to fuck his wife again was that he got off on it last time. While I was fucking my sister-in-law, he ejaculated watching us fuck.

So, I looked David in the eye, and I shook his hand and said, I will do it. And that is when the planning began.

Rachel loved to go camping. Karen hated it. David and I loved to go camping and fishing. Often, he and I would go away for a night to fish. Rachel always complained that she was never invited along. Karen was never interested. Rachel had not had a break from Becky since she was born. David thought he could convince her to come with us for a night and I was confident Karen would look after Becky. We would leave at lunch time on a Saturday and be at home by lunch time on Sunday. Giving up golf for one Sunday was not the end of the world. That would be the first part of the plan in place, getting the three of us in one place alone. Rachel was delighted to be asked and accepted immediately. Karen was also happy to look after her niece as our own five-year-old girl Alice, adored her 6-month-old cousin.

The plan we hatched was that after an evening fish, we would have some drinks around the campfire, and that after David and Rachel would adjourn to their cabin, David would blindfold his wife and I would sneak in and fuck her from behind. David gave me some of his aftershave and gum that he chews. He was also confident this would work as Rachel had stopped breast feeding only a week ago and had not drunk anything for 18 months so he was sure she would get drunk quite quickly. Rachel loved her wine. So, we had our plan and as agreed, as we set off on Saturday early afternoon.

We choose the Saturday carefully as it was the best time of the month for Rachel to fall pregnant so David was confident, she would be up to fuck him, even though I was in the cabin next door.

We got to the lake, started to unpack, and even had a couple of beers before fishing. David and Rachel were in their cabin, and I could hear them having an animated conversation. David appeared 10 minutes later and said Mike mate, we have a bit of a problem. Rachel has said she will not be fucking me tonight as the walls are too thin and she does not what to be embarrassed knowing you could hear us fucking. It was clear we need to produce a plan B and fast. David looked flustered, and I was thinking fast.

I produced the new plan and we decided to go with it. I got the fire started, put some music on, poured us all a second beer and announced it had been years since I had fished the far side of the lake. I said it was a 30-minute walk to get there, that I would fish for an hour and that I would then walk back to camp. All up, I would be away for about two hours. I stocked up the fire, grabbed my fishing pole and left wishing David all the best with his fishing and encouraging Rachel to take the top of a bottle of wine and relax.

As soon as I got out of site I circled back around and came in behind the cabins. The music was still playing, and I could not see either David or Rachel anywhere. I could make out that the wine had been opened and it looked like a decent amount had been drunk already. I did hope it was Rachel who had done most of the drinking. I quietly walked around my cabin to get a better view, being careful to stay out of site. And that is when I saw them. David had Rachel bent over a log and was fucking her from behind. Rachel was naked as was David and Rachel also had a blindfold on. David was fucking her long, and slow, and looking around presumably to try and find me.

I quickly ducked into my cabin, stripped naked, put on some of David's aftershave, put a piece of his gum in my mouth and as quietly as possible moved toward them. David saw me and ushered me over not missing a beat with his fucking. As I got right behind him, he leaned over and said into Rachels ear, stay like this honey, I am going to fuck you doggy style until I cum. With that he withdrew and stood aside. My heart was beating out of my chest as I pushed my rock-hard cock deeply inside my sister-in-law and began thrusting at the same rhythm David was using only seconds before. My god Rachel said, you seem bigger today honey, I am loving this sex.

I picked up the pace and it was not long before I was slamming my cock in and out of Rachels pussy. It was just as tight as I remembered, her cunt mussels grabbing at my cock. She was moaning and saying fuck me harder, make me cum. Give me your cum honey. Fuuuuccccck me. Keep going, that is it, right there, yessssss. Rachel had a big orgasm on my cock as I continued to fuck her. I looked over at David who at that same time ejaculated all over the campfire and that sent me over the edge as I flooded my sister-in-law with my cum. I stood there panting leaving my cock inside my sister-in-law as I know was their custom.

Soon I realised that Rachel could reach up and remove the blindfold at anytime as her hands were not tied up like they were last time, so I slipped out of her after about a minute. Before I could walk back to my cabin, Rachel ripped off her blindfold and turned around to look at me. Ummmm, she said, that was delicious thank you Mike. By that time David has hard again and he walked over to his wife and slipped his cock back in her cunt and started to fuck her again. It gave me time to calmly return to my cabin to re-dress. I dressed and rested for over an hour before peaking outside. Both David and Rachel were sitting by the edge of the lake and David was fishing. Both had their backs to me. I walked over to them to say hi. Thank you so much Rachel said to me. I just know you got me pregnant again and I love our little blindfold fantasy, as does David. I'm not going to lie, I love it too I said.

David said he had just started fishing as Rachel and him had a glass of wine and relaxed in the sun for a couple of hours. Rachel was sitting on a deck chair with her feet up high resting on a tree. I knew exactly what she was doing. Keeping as much cum in her as she could for as long as she could. David and I exchanged a look. Then he beamed into a big smile.

The next morning, we got up early and both David and I caught a nice trout each. He caught a brown trout and I caught a rainbow trout. We released them both back into the lake as it's the sport we love rather than eating the fish. As we packed up to come home, David said, a night away don't get any better than that, and I agreed with him.

A couple of weeks later, David, Rachel and Becky came over for dinner. Rachel announced with delight that Becky was going to have a little brother or sister as she was pregnant. I crossed my fingers behind my back that it was going to be a little sister.

To be continued