but I deep in my heart of hearts know that if she wants to consider the kids, a D doesn’t seem like the answer to her / our problems.
Absolutely agree. But back to my earlier point, right now in her fog she is so desperate to get out of the M that D is the only "viable option". That may very well change down the road but right now she's going to be very stubborn about it.
I feel the same way about my W. I don't think D is the answer to our problems but she is adamant. AS is right, your wife thinks this is only the way to get out of her current situation. My W insists there is no way I could ever make her happy again and we need to D. Maybe down the road her feelings will change but right now she doesn't see any other way out.