Do as others have suggested. Set up a schedule for the children.
What do you think I'm trying to do.
On days you work on school nights they need to stay with me.
No more staying over grandparents when you dump them off.
She is putting the kids in the middle. I am trying to rescue them.
I told her. On nights you work, they need to stay with me. You are welcome to come after work, tuck them in. Lay with them. I will not bother you. Then you can come back in the morning and help me get them ready.