In the custody agreement, it does not designated the pick up/drop off location of child

Your question is lacking enough details for a meaningful answer. The first step is to look at the existing order and see what, if anything, it says about the question you are asking.  If it is silent, the next question would be how, and in what order, the parties got to where they are now.  There is a general guide for how to draft such a timeline posted on our consultations page. Really, however, what you need is a consultation with a family law specialist to go over all matters of what has happened, exactly what orders now govern the situation, and what your options might be.