Until you are very sure what your reaction is going to be I would suggest not doing it and leave it as a fantasy. You haven't actually said what your wife thinks of this. It has to be a something you both want or you risk serious relationship problems.
Definitely something you should approach together, with complete honesty, and glacial care. Do not rush into this fantasy at all, because the reality of watching the woman you love with another man is much more than physical. She's not just giving him her body, she's baring her sexuality to him, sharing pleasures with him. And unless you're both 100% prepared then jealousy will kick in well before they've finished.
Because what she's sharing with him is what you thought was special and unique to yourselves, and now some bastard is moving in on your girl! And she's loving it!!
That's just a hint of what it might feel like. At worst it can destroy your relationship. I've seen it happen once before I'm sad to say. They both wanted to play a bit, but they were both under 25 and had only been together about a year. You can see where this is heading. Spontaneity can be a good thing, but not in cases like this. Just picking up a playmate didn't work out for them at all.
In my own case with my previous girlfriend we had a lot of fantasies and lots of magnificent dirty talk. But we knew that only one or two could ever come to fruition, we were realistic. And a threesome with another man did happen, more than once, and we both loved it. But it was discussed and planned for almost two years before we went through with it, and the third man carefully chosen. We had a good idea what we were getting into, we'd covered all our bases, we were very stable in our relationship (can't overemphasise the importance of that bit) and we were both in agreement about exactly what we wanted to happen.
If you and your lady are both serious about this, keep talking about it and seeing if there's anything which might make you feel jealous. Turn it into a regular pillow talk fantasy, discuss different scenarios, think it through. If there's a twinge of doubt for either of you, bring it up immediately and talk it through because it may be the unforeseen fly in the ointment. Only when it all seems to be a natural progression for you should you take that next step.
And might I suggest a better setting for the first experience? It sounds great on paper (or the monitor as the case may be) but some time in a private place to get to know each other intimately and be more affectionate will make the experience much nicer. And yes that affection which your lady must feel for, and share with, another man is The Big One which you personally have to come to terms with before even beginning to search for the right person.
A threesome can actually be a very sweet experience which bonds you both together over a special shared moment, not many people think of it as romantic but it was for us. Do it right and you have unique memories to share when you're together and relive in your dirty talk.
Breathe calmly, talk it through, play act. Repeat. It will happen when you both want it to.
Hi, we're new to this forum and are facing (well I am) the same conflicting emotions and feelings. I'm interested to hear what's happened, if anything, and how it went. PM me if you prefer. Cheers
Just curious how did this turn out for you guys?
If I can just share a different perspective here, and everyone is different and feels different things.
There may be a ping of jealousy, but really, it's not like you're wife is off having an affair, it's consenting adults. Yes, another guy has his cock in your wife, but your wife loves you and at the end of the day, the other guy goes home and you are together. I can definitely recommend doing to an erotic/lifestyle resort. That way, you get to meet and chat to people during the day and there's a really sexy vibe going in. Then if things progress the way you want it, great, and if not you'll still be charged up for each other. It's less pressure and stress that you may find a some swingers clubs (some are meat markets) and potentially easier than meeting online etc.
I hope I have helped, and I truly wish you both all the best of luck