So basically you told your daughter D11 that her mom was a liar? Why didnt you just say that its not nice to listen when people are on the phone and leave it at that?
Now your D will go back and tell your W that you said that ya'll were not divorced but separated and your D *will* tell your W that you said it isnt true.
And why on earth would you tell an 11yo about legalities like "nothing pending with a divorce"?