Hi P17, Thanks for your response. Their dad did the talk two weeks before he left. I made him tell them this was his choice, not mine. They know how I stand on marriage.
What they don't know is the real reason their dad left, although his avowed reason -- unhappiness with this M -- could be said to be true to an extent. I wouldn't tell them about past affairs, because that's just TMI.
And I didn't know all the details til about a month after he left. SA