Hi 2018MLMM,
Very sorry to hear what is going on, but it is good that you have found this forum.
She doesn’t know I know everything.
If she goes to conference, it is over! There will be no reconciliation!!! I have already talked to lawyers and have everything ready to go.
Should I be giving her this choice of whether she wants me and us or should I tell her I know, where she will probably stay with me out of fear of her life being thrown into chaos????
You say that she has no idea that you know, and then you ask about giving her a choice. Are you asking if you should tell her before she goes, and see what she does, or not tell her, and just hit her with divorce papers on her return?
As I see it, it all depends on whether you want to save the marriage or not. Frankly, if all the documents are ready, I think you should hit her with divorce papers today, tomorrow, or Friday, and tell her that you know everything. As Gettingoveritall says, that gives her the opportunity to stay or go, and you can base your decision about whether to go full steam ahead with the divorce, or attempt reconciliation, on that. Seriously, I think you should confront her as soon as possible, to bring the situation back under control and inject some reality into the fantasyland your wife has been inhabiting.
where she will probably stay with me out of fear of her life being thrown into chaos
You talk as if she has the option of eloping with the intern, or as if this is some kind of exit affair, and she is planning to run away. It seems far more likely to me that your wife is just 'cake-eating', and enjoying having a husband, home, and family, while having a second relationship on the side. I think it is very unlikely that she has any plans to leave, and that staying has been her plan all along.
Think about this: if she had any plans to leave (rather than stay), why wouldn't she have already told you that she had found a new love, it was all over, goodbye? The reason she hasn't done this is because the affair is not about her starting a new life with some intern she barely knows, but an exercise in deceitful selfishness and entitlement.
So if you discount any idea of her running off to start a new life with an intern (who most likely wouldn't want that either), you are then looking at her having a choice between staying with you in the family, or divorce. You worry that she will stay with you out of fear of change, but what makes you think she will not stay because her head will clear of the nonsense 'fog' of her cake-eating, and she will realise it is worth repairing the damage to the relationship she has done?
I guess the flipside of that debate is why you wouldn't just divorce her and have done with it. I would guess that as you have been doing the 'pick me' dance (as they call it in these forums), to try and look good to your wife, you want her to stay, and you want the marriage to continue. If that is the case, why don't you see this as a set of decisions or choices you are making for yourself?
This is what I recommend:
Blow the affair up immediately. I cannot see any reason, regardless of outcome, why it should be allowed to continue, and making the pair of them cancel their fake conference is a good way to begin the process of ending it. The affair has gone on too long already.
Have her served with divorce papers. As others have said, beginning the process does not mean it has to run to its conclusion, but the serving of papers always has high impact, and can help jolt your wife out of the fairyland of the affair and into the real world of consequences. It will also send a shock wave out to the intern, because an event like this can so easily become known to the workplace, and it won't do him any favours as he starts to build a career. You may wish to have her served at work, to drive the message home.
Serving her brings control of your life back into your hands, because it gives you the power to end the marriage unless your wife changes her ways and proves to you why you should not end it. You cannot control what she does, but you can control your response to it, and what you are prepared to tolerate.
Think about what you need her to do immediately, and longer term. That means things like breaking contact with the intern, transparency with her phone, email, Facebook, etc. However, as they work together, they have plenty of opportunity to see each other at work. That may require a change of shift pattern, so they do not work the same hours, or even a transfer. Plenty of people here can advise you about options.
As I see it, the current situation should not be allowed to continue a day longer. There is no benefit in that for you. Why wait?
It sounds like dropping a bomb on the affair and seeing if reconciliation is possible is what you would prefer, so please do not allow the fake conference weekend to go ahead. It will only make things worse. Getting busted on the verge of going will have a more powerful impact than if it happens afterwards.
If your wife insists on going anyway, tell her that she has made her choice, and that along with filing for divorce, you will be contacting her management to make them aware of her choice. That should spark some lively conversations between her and the intern about career development.
I am so sorry that you are in this situation, but you have the power to take control of your life back. I think that you should use it.