My wife and I have been working on a nasty fantasy together and I might see about making it happen.
Basically the idea is that I suspect she's cheating and find a pair of her panties that are wet and cummy.
I decide to punish her for being a slut and hire a guy with a very large and thick cock to help.
I'd have my wife tied to the bedposts and basically restrained and helpless.
I want to look right into her eyes as she's punished for being a slut with a rough and hard ass r**e by the guy with the huge cock. I want to see her eyes pop and her mouth go into a big circle as she groans and begs for mercy.
She wants the ass r**e as much as I do so it's really a shared fantasy. When the guy finishes and pulls out of her ass, I sometimes imagine sucking his cock clean, especially if it's streaked with her fudge.
All just horny talk between us and not likely to ever happen, but you never know.