Dragonfly, that is one of the biggest misconceptions LBS's have. Fear!
If I go NC, or I start living my life without them, it will give them the impression I don't care and they may move on.
But they have moved on, and sometimes they need to fear you have also.
You are not just waiting around for them to come around. You are living your life,
and sometimes THAT is what scares them more than anything.
Wait, why are they just letting go?
I'm not a fan of NC but there are instances where it is best for you to move forward.
Now having said that, if young children are involved it's almost impossible to go NC and co-parent, then low contact is best, or Dim. Only contact, when necessary, over the children....and only if it is important.
That does NOT mean "family time."
They blew up that family and have no right to "family time" anymore.
They now gave a right to spend time with their children, but not as a family unit no longer, that was the choice they made when they walked away.
That's another thing I think LBS's get wrong.
They want to show their spouse what it felt like to be a family, maybe they will miss us all being together like this.
But it doesn't. It only gives them no motivation to change. They can have their freedom and still have their family whenever they need that fix.
Take that fix away from them unless, or until, they want to be a proper spouse and parent.
I've never seen any MLCer come back unless they have missed what they threw away.