cucked by stepson

I could fictionalize this story and add tings to make it hotter or have a more satisfying conclusion, but I'll tell it like it happened, warts and all.

When I was with my ex her teenage mister lived with us. They would frequently wrestle and rough house. I told my wife he was getting a bit old for this activity, at least with his lady. She told me to mind my own business and that I had a really sick and dirty mind. (I do actually).

One evening I had gone up to bed leaving them downstairs watching TV. I was awakened by a loud thump from downstairs and made my way down to see what it was without turning on the light. When I got partway down the stairs I could see the livingroom, lit only by the TV light. My wife and her mister were wrestling on the floor. I got fascinated though because she was wearing a long tee shirt, the one she wears to go to bed and he was wearing his PJ bottoms. The light was poor but I thought I saw her panties on the couch. He clearly did have an erection, straining at the snaps on his PJs. She rolled him onto his back and was on all fours over him, pinning his shoulders. I was sure I saw his cock had popped out but in the next instant she sat back on his hips and her tee shirt covered everything. They both suddenly looked surprised and froze "Mom?' he said. She said "it's OK" and slowly got up off him. He sat up and fiddled with his snaps and she sat on the couch and said once more. "it's alright". She never wrestled him again that I know of.

I believe that you what you suspect is correct; that your former stepmister's cock did slide into his lady's (your ex-wife's) pussy. However, I believe that it was accidental and that both may have regreted it.

At the time, was it possible for your ex to be impregnated? If the answer is yes, the risk of having a baby with her virile teenage mister may be why she never "wrestled" with him again. Making out with your lady is one thing, but fucking a baby into her belly is a taboo that many men (and women) will not even think about. Laws prohibiting cuckold exist because centuries of human experience have shown that youngren born of an cuckoldious relationship will, more often than not, have some very serious mental and/or physical handicaps.
A man has not lived until he watches another man fuck his wife!