Cesco,The kids don't know. Its going to be VERY hard telling them.
Your wife should tell them with you present so she doesn't try a "weasel;"
Oh yeah, this is her responsibility. Don't you dare be a nice guy and rescue her from this.
Hey man, I hope you know me well enough by now to know I am not telling them. I have already told W this is her decision, so she's going to tell the kids - with me present, of course.