Sounds to me like your wife is already interested in the hot-wife-cuck fetish.
Possibly terrible advice but I'll give to anyway:
Secretly do some homework on hotwife/cuck fetish, you can tell her later if it was a surprise success or totally !not!
The best way to be introduced to a new fetish is as masterbating material (you have full control in stopping it, with no power dynamics or future repercussions)
Sounds to me like your wife is already interested in the hot-wife-cuck fetish.
Possibly terrible advice but I'll give to anyway:
Secretly do some homework on hotwife/cuck fetish, you can tell her later if it was a surprise success or totally !not!
The best way to be introduced to a new fetish is as masterbating material (you have full control in stopping it, with no power dynamics or future repercussions)
Here a great ntr game you can try:
https://hangovercatpurrroduction.itch.io/ntrd-by-clumsiness
And a great dougin
https://nhentai.net/g/460008/
And a BBC comic if your not much for anime
https://comics.8muses.com/comics/album/Blacknwhitecomics_com-Comix/BlacknWhiteComics/Slutty-Moms