My wife and I have been together since college. We had been together for almost 2 years when her father got married. Her new stepmom had three children from her previous marriage, one of which was her new step-brother, Brandon.
Brandon is about 3 years younger than us. He was a very attractive frat guy type and I always wondered, if given the opportunity, could they resist the taboo step siblings fantasy.
I’ve always been a bit of a secret cuckold and have never told my wife this but at the beginning of our relationship I would fantasize about them together often. I really find it impossible to believe two very attractive people who became step siblings in their late teens do not at least fantasize about each other.
Fast forward 5 years, and we have been married for a while now. Little step bro has gone from an attractive young-looking guy into a full grown, and more muscular man.
That summer we all went on a beach vacation as a family and to be honest, the thought of them together had run its course in my mind.
Then one day we rented a boat and as he sits down next to us I blatantly see her looking at the outline of his dick in his swimsuit and then she bites her lip. Just like that the old fantasy was reignited tenfold. For the first time, I had visual evidence that she may actually want him.
That night we had amazing sex and I could tell where her mind was. She was acting a little more slutty than normal. She wanted to give head a little longer and a little rougher. I know she was thinking about his big cock slamming her throat.
The vacation ended and after we got home, I waited about a week and then I checked her internet history. It was nothing but step-brother porn. The image of her with a dildo, fucking herself to the thought of him was so hot to me and I just needed to know more.
Nothing more happened for a couple of years until we went on another family trip to a mountain house. We were in the basement bedroom sharing a bathroom with her step brother’s room. I devised a plan to get into his head and see if he felt the same way as her. Knowing guy’s minds are dirtier and my wife is a bombshell, I knew the answer already but I wanted confirmation.
I set up my phone in the corner of our bathroom hidden and hit record and I left my laptop on the counter top. I left up a normal website, but moved the screen to the left some so just a small part of a picture was showing off to the right. It was a picture of my wife and you could clearly see a bare leg but that’s it. My hope was he would be a little nosy like most guys would. It he decided to get really nosy he would be able to see more pics were available for his viewing pleasure.
That night after he took a shower, I retrieved my phone to see if he took the bait. As I hit play, I saw him come in. See my laptop and he moved it to the side of the sink. As he was moving it, he caught a glimpse of the leg. I’m sure he thought his pervert brother-in-law had just left up some porn, so you can imagine his face when he clicked to bring the image up front and it was his step sister completely naked. His mouth gaped open as he stared at her laying on our bed, tits and pussy out.