WW getting a flat - NOT your concern. If you had young children, thats a differet scenario - you don't.. Hence unless she expects you to pay for it, its nothing to do with you.
Leaving her mothers - Not your concern
OM still on the scene - Not your concern
You have 2 concerns - Yourself and your Daughter. Thats it. Unless WW starts to cause issues with yourself or your daughter - Not you concern - You cant fix her - You cant save her. Let her go and do her selfish WW stuff - You enjoy life !
Previous username - Helpme123.. A name chosen at a desperate time..
Now Mr Brightside.. coming out of my cage, and doing just fine.