Co parenting has its ups and downs but parents have to remember that it's not about you anymore it's about the kids. A lot  of parents always make it about them.If you have that baby mama or baby daddy that just like to keep up drama when dropping off the kids. I encourage you to seek God first on how to handle your situation when you have a parent that is not willing to work with you.Problems not solved by fussing,and being mad at one another always remember parents it's not about you anymore.Seek God first and allow him to fix your situation each day it will get better trust God parents