Have you thought about finding a counselor for your kids?
I have toyed with dropping my C and taking the kids (or at least D9) to a C. Not really financially feasable to do me and the kids both.
...the counselor said the more they resist, the stronger the message that they have something to process.
I used similar logic on myself to pull the trigger on finding a C for myself.
...kids will begin to internalize the guilt and fault themselves.
As far as I can tell we've been lucky and the kids understand that all this crap has been mom and dad's doing. I do agree that some things should be brought out into the open. I don't dare do this on my own without W around. Won't make that mistake twice. I'm not sure I want to do it with W around either. Maybe a C would be the best method. Although if W and I talk to the kids together maybe some insight into W's feelings could be gained indirectly.