I want to see my wife with another man

I’ve always had this fantasy. But I’ve actually mentioned it to my wife and she is up for it. Says it would turn her on. Preferably I would like a guy with a bigger dick. And somebody that can go for a long time and hard if she needs it. But there is a lot of hurdles. Like if you know the person, they have to know that it’s one and done and not to text her afterwards to do it again. And then, obviously the person has to be clean if they’re a stranger. But I really wanted to happen.