The best way to do this is for you to get the best custody agreement possible. Working on the agreement in a productive, business-only manner and not engaging in these side-battles over time that is currently "hers" will help you get there.
If you have rational, reasonable people that are looking at being productive or cooperative, then that would be true. NC's wife is not that kind of person. It's hard to understand if you haven't personally experienced that I think.
NC, I do agree you are doing the right thing on Friday. That would be great if she looked at herself or would return the generosity, but I wouldn't hold your breath. Karen