Introduction and evolution - looking

I'm interested in finding a story that I can show my wife about slowly introducing cuckolding /hot wifing in a safe way, but then it evolves to become more intense. It shouldn't be out right obvious that she is being manipulated by the husband, but presented as more of an experiment as she might be curious about having someone more dominant. Anyone know of any like these?

Most of those stories are written by guys, for guys. They usually dive right into the hard core stuff quickly and the content is often extreme. Finding the right one might prove tough. I would suggest searching literotica.com to find a story that's similar to what you want, re-write and edit the storyline to something that is tailored to your own needs, then send that to your wife. I've done that before. My wife isn't into the FemDom and humiliat1on aspects, so I'll edit that content out of otherwise good stories, and send those to her.
cuckold - Pronunciation - kuk-uhld - noun 1) The husband of an unfaithful wife. 2) A husband whose wife has sex with others. NOTE - It does NOT say: Sexually confused, submissive, humiliated, sissified, crossdresser, cocksucker, or piss drinker

That's a great idea. We watched 50 shades the other night and that piqued her interest a bit ... though she's not into hitting it being hit, I think the light dominance sorta appealed to her even though the guy was emotionally a wreck.

I was thinking a light experimentation that evolves and ramps up with the right bull.

She's not really into swinging and it has to be real subtle so that it's not apparent that it's set up.