I spoke to a family therapist about what to say to the kids and she *strongly* recommended against placing blame. She said the best thing you can do for your kids is present it as a course of action you've both agreed to, that it's not their fault and more importantly there's nothing they can do about it.
She said the conversation you have with them when they're 27 is much different than the one you have at 7, when it needs to be all about them.
I asked about the honesty argument and her response was if you want to go that way start by explaining there's no Santa Claus, Easter Bunny or Tooth Fairy and see how that honesty feels.
Acc
Married 18, Together 20, Now Divorced M: 48, W: 50, D: 18, S: 16, D: 12 Bomb Dropped (EA, D): 7/13/11 Start Reconcile: 8/15/11 Bomb Dropped (EA, D): 5/1/2014 (Divorced) In a New Relationship: 3/2015