Peace:
First, sorry you're going through this.
Next some questions I didn't see addressed in your posts.
-Have you visited a family law attorney to discuss what divorce looks like in your state? (I assume you're in the U.S.) I would highly advise this in case your WW has taken the affair underground, turns out if was an actual PA (do you have or determined a dealbreaker for yourself?) or your WW, in the future, comes to you with the ILYBNILWY speech. Most initial lawyer consults are free or rather inexpensive ($2-300.00 usually credited toward the retainer if you hire them fully) It would be a good investment to know what your options are in the future.
-You can decide whether to tell your WW that you visited an attorney... either before or after the consult. May help with any "fogginess" (that "she admitted that she has fallen out of love with me") that your WW may be experiencing knowing that you have at least explored divorce options.
-You state that she is due for annual bonus in a couple of months, and afterwards will leave the job, correct? Has she started to update her resume, sending them out and seeking interviews? Or is she just going to quit and let you be the breadwinner for awhile (also another question to explore with attorney...potential alimony/child support issues) Or has she done nothing and hopes you forget about this?
-It's clear this trauma is affecting you and your "losing your mind," add that with your wife's defensiveness and self-pity... can you take a "break"? Have family or friends or an affordable extended-stay hotel that you can stay at for a week or so? Let your wife (and you, of course) see what its like to live like a single parent for a bit. Give your mind a rest and detach from her, tell her you're leaving for a week or so, that you'll pick up kids for dinner on Wednesday, and go. Tell her to not contact you unless its an emergency about the kids. You say she's been staying and hiding at work late to avoid you and dealing with the situation she put ya'll in ..."well here you go, dear, see you next week. Oh BTW kids get home or picked up from school at Xpm, please make arrangements. Also, I'll facetime the kids every night at 8pm and will pick them up for dinner Wednesday at 6pm." Let her live like a single mom for a bit with no immediate support around the house and let her deal with the kids' questions that will surely be asked. Your kids are old enough that they must know things are different in the house, even though they might not have the reason or details. See how she answers those questions... does she re-write your marital history, does she blame you and throw you under the bus... or does she step up and say "we're going through some problems and it's your mother's fault." It's up to you if you want to discuss beforehand what she'll talk to the kids about... but she needs to understand that she's the villain in this and if ya'll divorce, eventually and when age-appropriate, you'll tell the kids the real reason why you and her split. She needs to consider how, in the future, her actions will affect her relationship with the children.
As for you, concentrate on work, go to the gym or exercise every day, stay away from alcohol/drugs, eat clean, call up some old friends and reconnect, go out with some buddies to watch sports or play poker... set aside your feelings of trying "to fix this" ---you need a break, detach and try to learn you can't fix your wife and can't control the outcome of this.
Your wife is going to complain, oh, is she going to complain... "Why do you get a vacation and I'm stuck here with the kids for a week!?!?" Just tell her, its obvious she's tired of talking about this, that your tired of being stuck in this position, spinning your wheels with her, and you are also tired of just talking about this and its time to take some action to see what one possible future path looks like if ya'll divorce. Again, may bring some further clarity to her.
Make sure you tell her (and document) that its not permanent, you'll be back in 7-10 or so days (so she can't claim abandonment) Run this by your attorney first as well. But this is actually for the both of you... you need to see how you feel being away from the kids for a bit. No one wants to be a parent half the time, but can you make it? If you stay, you'll be eating the shyte sandwich as it is called here... maybe you can learn you can live with eating the sandwich for the kids' sake. Or you might decide you can make it for 9 more years (until the youngest leaves the house) and then leave her. I don't recommend this, time is a resource that you can never recover. Your 43 now, much better to be back in the single market at 43, rather than 52... ask me how I know, I'm 52.
[This message edited by NukeZombie at 9:30 PM, Sunday, November 26th]