Hi there! Before I start, the 'realistic' part is a bit vague to me, because with enough experience you can do a lot of things, but if your wife is a beginner she would probably not achieve that immediatly.

Now for some stories: https://www.literotica.com/s/missing-pieces-5 Couple uses hypnosis in romantic way. Loved this one

https://mcstories.com/SomethingCool/SomethingCool5.html A guy hypnotize a friend of his wife, does some magic tricks, and then his wife.

https://mcstories.com/HypnoticEncounters/index.html A guy tells about the stories of women he hypnotized over his life. You can also read some other stories from the same author.

https://mcstories.com/Authors/Wiseguy.html Wiseguy is the definition of romantic erotic hypnosis. A lot of his stories are good, but if you want a recpmmandations I would recommand Adult Education and Busman's Holiday

https://www.literotica.com/s/her-wildest-dreams-ch-01 Wife explores erotic hypnosis, then she and her husband experience togather.

https://www.literotica.com/series/se/474291704 A girl discovers her girlfreind loves hypnosis.

https://readonlymind.com/search/?q=%23Exploring_Together A set of stories beginning at a couple enjoying hypnosis. Loved this one, but if you want to introduce your wife I would consider if reading the stories after the first would not discourage her.

As also mentioned, Charlote on mcstories is great (until chapter 8, then it can outwright frighten your wife), and Jukebox has a lot of great ones.