The idea Ken is that she doens't leave... she finally breaks and offers a commitment you can respect and sticks to it.
I suspect though, that she will walk out on you and the kids before doing that... She WILL come back.. you have kids... BUT... I am hoping you confronting her with a GOOD consequence plan like this will shake her up enough that you won't have to push this through to the end.
Note : BE PREPARED EMOTIONALLY to FOLLOW THROUGH.. this is NOT a threat, its a PLAN.. something you WILL DO unless SHE changes.
Do NOT accept promises and tears... accept MAUTURE actions ken.. this woman is a damn MOTHER... she's acting like a two year old.. do you want a two year old educating and raising your children?
Protect your family from this nonsense... be prepared to escort her to the door if she continues contact...
SHE is choosing the telephone contact and a separation over a marriage and a family...
that's HER choice...
YOU need to find a good family therapist too... don't wait til she agrees to see one to start looking...get one NOW