One thing that is common on this site and something I dislike is when posters make statements like "this is the worst that I have ever read here", or "this is totally non-recoverable".
I have said the following several times: A couple can reconcile from anything as long as both partners understand what lies ahead and are willing to do the work.
I have also said that there is no obligation to reconcile. Like here, in this situation, you are not obliged in any way to reconcile just because. If you want to reconcile, if your wife was on board with reconciling, and if you both could find a united path… great. But if even one of those elements is missing then hoping for R would be like wishing you got the lottery numbers correct.
With all that said…
It’s very common that posters come here unclear on their future. When I read a situation I often try to evaluate if the BS has options or not. Like… if a WS confesses an ONS on a Sunday and is all remorseful and honest then I think the odds of possible R might be high. No less infidelity, no less pain though.
When I read your story I was thinking that you have a really tough road ahead…
I just think the length of the affair, plus all the places, times, events… it’s contaminated… It’s got to shake your belief in your wife to the core. This will be a really tough thing to work through…
Not impossible, but IMHO you really seriously need to look into what ending this marriage would look like.
I get your fear for the children, but the old adage about it being better for kids to come from a broken home than live in one holds true. IF you want to remain married for the kids you would need to reestablish a completely new marriage, and frankly it’s not clear if your wife is capable of that.
For one, total and 100% transparency is required. She needs to answer every factual question you need an answer to. She needs accountability, openness, therapy… There is nothing "normal" or "sane" in having an ongoing 14 year old affair.
Without this openness and commitment your path to reconciling or even rug-sweeping to a semblance of family-life is blocked IMHO.
As suggested look into what a divorce would mean.
Depending on age of kids, income and all that then expect equal custody. Chances are that the mom is better situated for prime-custody, but the two of you would probably share custody with some schedule.
Remember there is no real revenge or payback for infidelity. You wouldn’t divorce her to get revenge, but rather because you don’t see her as a life-partner. Therefore there isn’t much to gain in being confrontational or making each other enemies. You can be amicable in interacting and united in parenting decisions without sharing a home or bed.
Big difference in saying "I’m filing because you f…ed around!" and "I can’t see you as a safe partner and your affair has made me not want this marriage".
Get a realistic understanding of divorce. I always recommend an attorney to ensure everything is done correctly, but maybe the two of you can do this amicably and reasonably with a mediator.