This is a brutal way to end a 30 year marriage and close to 40 year relationship but it was her choice.
IMO, your healing and your mental health depend on your taking responsibility for your actions. You have many options. Your W can't make you choose D.
I'm all for D if it what you choose mindfully. But if you feel forced into D by your W, I think you're making your road a lot more uncomfortable than it needs to be. For example, if it's your W who's making you D, what happens if you see a glimmer of remorseful behavior? If she's driving your decision-making, shouldn't you give her some time to show her remorse is permanent?
You may be unready to D right now, even though you turn out to be ready tomorrow, or next week or month or year. If you're thinking she's making you D, something unhealthy is going on, IMO.
You control you. Don't give your power away. Don't force yourself into a mold. Be yourself and your own best advocate.
This is not a situation in which you have to act fast. Take the time you want. Act on your time schedule, not on anyone else's.
*****
I just have to get the kids prepared for a terrible surprise and make sure the wife’s family is watching out for her.
I think you owe your adult kids notice before you file - D is bound to bring up a lot of feelings, and the sooner they can deal with them the better for them.
You have responsibility for yourself if you D. Your W has responsibility for herself and for getting the support she needs. If a post-filing suicide attempt would derail your plan to D, you're probably not ready for D.
There's no shame in that. If you're not ready right now, do what you need to do to get yourself ready. If you're uncertain about D right now, do what you need to do to gain certainty.
*****
I'm probably known around here as an advocate for R. In fact, I'm not. I'm an advocate for people - both BSes and WSes and everyone else - to take responsibility for themselves and to use their own power to make their own choices. When it comes to figuring out what to do with one's M after infidelity, that means (in outline form) figuring out what one wants and what one can do to come as close to what one wants as possible.
Until one partner acts unilaterally, both the BS and WS have power over timing. IMO. lots of people act fast out of fear, and I think that's a big mistake.
*****
IMO, you're in shock, and people rarely do their best thinking and interpreting feelings when they're in shock.
I didn't experience trickle truth, and it might have been my boundary. I might have ended our M if W hadn't come clean, so I understand if that's the case for you.
Otherwise, my reco is to hold off on making a decision until you feel good about whatever decision you make.
And filing for D as a way of getting your W to come clean seems like a waste of time, energy, and a lousy way to begin R if your W appears to come clean. I think you'll get a much better response if you tell your W something like, 'I need the whole truth. If you come clean now, I may stay. If I find out something significant in 6 months, I WILL walk.'
Then you can evaluate your WS's response. If she comes clean enough for you, you stay; if she doesn't you probably file. (as I say, I think I would.)
My recos, as strong as they can be:
Don't let fear make your decision.
Don't let others make your decision.
Don't cut yourself off from what you want until you get enough evidence that what you want is out of reach.
Four days ago you wanted R. Yesterday you implied you had chosen D. Today you want to assess.
Someday, probably pretty soon, you'll wake up and know what you want to do. You'll announce your decision. You'll feel pretty good about it.
Your posting doesn't say you're there yet.
Give yourself more credit than you do now. Have some faith in yourself. You'll know what's best for you sometime. You just need to accept that you won't know until you know.