If we're turned on by the fantasy, does it mean the reality of having her suck a black cock would be fun? Or, is it possible, like fucking your student or something, that the consequence-free fantasy is much better than the real thing?
XJ, yours is the first post I've read in a while where all the right indicators are flashing to move forward. Your wife and you share good fantasy play, she's shown interest in b2w, you both show the desire to experience more but wish to protect your marriage. Obviously, swinging doesn't come without risks, one of which is how it will affect your relationship, with each other, down the road. My assumption, with married couples, is always that the 2 of you care most about your marriage, so move forward cautiously, and in stages, rather than diving in and seeing what happens.
You're new here (welcome by the way), and haven't provided any background info of your sexual experiences as a couple thus far, or filled out your profile. I think this is important to know before any logical recommendation can be suggested, as everyone is unique in a way. However, there are many threads in the archives where couples (male spouses primarily) have asked this same question. So you could always read those to start.
This kind of activity tends to drastically elevate emotional levels; some people respond positively to them, and others negatively, and you often don't know which way you'll react until it happens. Personally, I don't think I'd want to chance how I might react watching someone else screw my wife
IF I would have problems watching a guy rub her breasts or kiss her, because once she screws another guy, you become a cuckold, and its not retractable. So I suggest you two move forward in
small steps of experiences , and there are plenty of suggestions for that.
Look forward to learning more about the 2 of you in future posts ...
Mac