There is an abuse pattern called the 'golden child' in which for one reason or another the one who behaves this way sees a child as part of themselves. Other children can be scapegoated or ignored.
This may seem very strange but being ignored may be the healthiest of all. I suggest you normalise and plan to distract the children at this point, showing a 'so be it' stance.
The child with the biggest risk is the golden child who will have 'flea' type behaviour possibly feeling 'special'. Be glad for your two children out of her influence.
You, lovely lady are the most important one for the health of your children.
Breathe, sadly this is a good thing.
V
Freedom is just another word for nothing left to loose. V 64, WAW