Jer - with MLCers you are d*amned if you do and if you don't as well. Wonka is right about being truthful. What your W thinks and feels changes from moment to moment, and in addition they forget a lot and then rewrite history as they go along - the rewriting history isn't just of the past of the marriage. It is on-going to do at least two things.
Make sense of what is going on to them
Put them in as good a light as possible.
This amicable split for instance: why do your feelings have to have changed to suit her emotional landscape? Because anything else would make her look bad. At least for now she isn't doing the 'I never loved you', nor, as my xh did telling the children that they were never wanted . . . . .(And now he wonders why they have a non-relationship)
I agree about keeping it as amicable as possible for the children, but the overwhelming odds are that you will be the main parent, and certainly the only reliable one, as long as she is in crisis.
So it is important that your children trust you 100%. They do not want or need two apparently confused adults in their lives.
Do not answer any of their tough questions for your wife. This is her circus. It will be difficult, it has to happen, and you will be OK. One fucntional parent is enough. Two is great, and a bonus in life!