Wallowed,
Rant as much as you need and about anything that you need to… this place is also for it.
You need to put your self together so your wife. You both need to reach a place where you can be ready to talk about what happened and you be able to keep calm and cooled minded and your wife explain what was in her head and ready not to answer your questions but to think about them.
You W really need to understand the full consequences of her affair about people that are or will be affected (family, kids, friends, etc.) places forbidden from now on (where you feel not safe her being at) friends that knew and didn’t tell you (from volunteering or others) that now must be gone for good, etc. Also she needs to realize what does she really wants because she already has payed half the cost, the other half she will pay for the rest of her life with you or without you.
She needs to understand what would take place if R and if she will be willing to do it. Even if D she will need to fix the relation with her kids once they realize what happened.
She has a lot to understand and realize about the aftermath of her doings before decide what she really wants or will be willing to do to get it.
One last thing, this is based on my experience and only mine. You need to let her go at least in your mind. You shared a wonderful 26 years together but now your marriage is over. It means that she was/is a great mom for your kids, was a great partner for you for long years. Enjoy the memories and do not let her doings tainted them (maybe your daughter marriage already is but not the ones before). You need to understand that your wife is death and is not coming back. Once you accept it and mourn it, you will be able to see if the person that replaced her (your WW) is what you need. Understand that you own her nothing now and not in the future as your marriage was not a business deal to compensate. She was with you because she wanted and you were with her because you wanted too, no more.
She own s you nothing because she shared her life with you for 26 years and then decide that no more. The betrayal was not to decide to be with someone else but to didn’t tell you what her plans were. She didn’t show the respect for you and your kids deserved.
She owns you nothing, she, and you, are a grown up and know what the word is like and know that sometimes you get hurt by the ones you never expected. This is life…
You need to find peace with what she has done in other to forgive her and being able to make the decisions that allowed yourself to look at the mirror every morning and be OK.
Your wife is beginning to do everything needed to R, as mine did, and you will need to decide if you could R, I couldn’t, as R is not mandatory and some people can but others, like me, cant not.
Affairs are not consequences but choices, are not mistakes but decisions. Sorry but you were not enough after 26 years and is time to accept, it is like when you finish a great book or your kids grow. It is time to accept that is over.
It doesn’t mean that you both cannot be together again as a couple, a different one that fulfil her, and you, that you both decide to be together again.
It’s been more than 16 years and I think about her at least once a week, I am at SI because her doing are still in me (the pain is gone but the damage…) and affecting my current marriage.