I was exactly where you are until the 4th March - even after all the attempts at DB, its hard - i was still checking the phone etc. She put the nail in the coffin with some comments about my Grandad, and that was it for me. It was the cruelest, but best thing she ever said.. In terms of your sitch, your summary above shows you really need to detach or else it will eat you up. Your WW is showing zero respect for you. Your children also see this. Take back your self respect, and they will respect you as well for being strong. Even in 3, 5 , 10 years.. They will know you gave it 100% for six months. Do you really want to be where you are now in another 6 months?
Your WW is being led by her emotions for her own selfish gratification. She is cake eating, showing zero respect and neglecting your children.
Like i mentioned before, she has lost nothing, or doesnt care about that she has lost.. And she doesnt care about hurting you. At some point, you really need to consider yourself. Your children know you tried and tried. But they will also respect your for walking away.
Previous username - Helpme123.. A name chosen at a desperate time..
Now Mr Brightside.. coming out of my cage, and doing just fine.