Fist off, my wife has said multiple times that she LOVES the freedom to fuck other people. Second, yes I have always been in the same room when she fucks someone else, that is our arrangement as of right now. I LOVE watching her fuck! It is like watching live porn, but with an emotional connection with the girl! There is a huge mix of emotions, but if you are in the right mindset about it going into it, it is the biggest turn on ever!!
Third, yes, every time my wife has fucked someone else, at some point, I have taken part. I have had the other guy watch us fuck afterwards and that was super sexy and a huge turn on!
The bottom line is this, yes it is a big decision to make, and communication is key, you will be apprehensive no matter what, you have to talk, talk, talk with you wife before, during and after and you have to agree going into the experience that you will NOT hold it against her EVER...remember that, most likely, you were the one that instigated this idea, so do not get mad at her if it doesn't go exactly as expected. Think of it as an adventure that you and your wife are about to embark on, and for bad or good, it is something that you guys will agree to take a chance on and experience together and remember forever! That is what marriage is about isn't it? Experiencing new and exciting adventures together? It should be about creating fun and memorable memories together with the underling thought always being that you love each other, and will be together forever!!!