Many years ago, I became online friends with a fellow writer who was just getting into swinging. We’ve unfortunately since lost touch, but one day he reached out to me in complete shock. They’d had some wonderful encounters with a woman and then she dropped a bombshell on them, like in this story.
In real life, he and his wife decided to not pursue things with this woman, for a lot of good reasons (the incest wasn’t the only yellow flag). But he gave me permission to write a “what if” story.