This is a fantasy, as we do not condone incest or sex without the proper measures being taken for prevention of STD's. At the end I'll let you know what parts are true.
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We've had a rather normal marriage, and lived what a lot of people would presume was an uninteresting type of life. For the most part they would be right about that, but through the years we've gotten into the habit on doing something "special" 2 or 3 times a year. This has mostly been at my insistence, Sam says she goes along with what I want mostly just to make me happy.
For some reason she just doesn't want to admit that she's also enjoying herself. These special times have covered a wide variety of experiences and often have included groups of other men. This experience was quite a surprise to me, but turned out very well.
It all started when Sam's brother Rick had stopped by to help me move the bedroom furniture so we could have new carpet installed. We were sitting around the kitchen having some coffee before we got started and I noticed that as Sam was hurrying around before she left for the day Rick kept sneaking looks at her. She was dressed in a simple summer cotton nightie, and although it wasn't revealing it wasn't made of very thick fabric. She wouldn't normally have worn it without a robe in front of visitors, but this was herbrother so she must not have thought about it.
I watched him, watch her, for a little while, and could see that he was quite interested in catching a glimpse as her little breasts shook the fabric of the material. This gave me an idea, so I made a quick trip to the bathroom, and on the way back I dropped a couple nude photos of Sam behind the dresser. I was curious to see what Rick would do when we picked up the dresser and he saw the pictures.
In just a few minutes Sam was dressed and out the door to go shopping, so we went upstairs to move the furniture. After taking out the bed, and some other pieces, I made sure that Rick was on the end on the dresser where I had dropped the photos. We pulled it away from the wall, and as he was bending down to lift the dresser picked up the Polaroids instead. He quickly looked at them, and then almost as fast turned them over and handed them to me. I tried to act very surprised, and remarked that they must have fallen out of one of the drawers. I looked at them for a little while, and them tossed them, picture side up, on top of the dresser.
He just couldn't help it, so when he looked at them again I asked him what he thought of his sister. He looked like he didn't know what to say, but finally said that he'd "always wanted a piece of her" since he was in junior high. She's a few years older than him so she was always more mature than him in school.