So do not be surprised if she comes at your very aggressively over the next week with determination to push your buttons.
You need to protect yourself.
I would get 2 Voice activated recorders and carry them at all times. This is legal in most places when you are recording your conversations. ( you can verify with your lawyer or read the laws of your location )
If she raises the bar to confrontation of a physical nature such as hitting or throwing objects. Remove yourself from the room to a safe location in your home and call the police.
Keep yourself and your children safe at all times.
Concentrate on yourself and them.
And take care of them. They will need it.
No arguing , no talking bad , nothing.
If they ask. Be polite and let them know they are loved.
You need to weather the storm that is coming over the next few weeks.
Eventually the enabled WW realizes that they cannot push your buttons so they will change tactics.
Your strength is to remain calm and respectful in all encounters and communication.
Take Care.
Flowers always make people better, happier, and more helpful; they are sunshine, food and medicine for the soul. unconditional love is awesome!