don't be scared to exchange the kids with her face to face. I know you don't want to see her b/c of the pain it brings but she will only see weakness in this. Show up well-dressed and groomed, recall the great things you have going in your life, and smile when you see your children. Be brief, but polite with her and then smile and leave.
H 34 W 29 BD 3/12/18 Divorce Busted Spring 19
It is not things that bother us, but the stories we tell ourselves about things.