my wife left, but still lives with me #3/continued

[tough spot]

Here is a question. Usually when the wife and I talk to the kids we try to present a united front, even if we don't quite agree. When it comes time to tell the kids we are splitting, do I make it clear that I am not in agreement? They are 6 and 8, the older kids already know but I guess if the question comes up with the older kids the same question applies.

Does that cause additional strife to the kids? Is it part of the WAS bearing the responsibility of their decisions?

Please let me know your thoughts.