<human>: Can you condense the text into three sentences or less?

Ok background. New York State

I am recently divorced and have a set 50/50 custody agreement with my ex. We both have joint custody with no residential parent assigned, therefore neither of us has primary custody. There is nothing in our custody agreement restricting taking our kids out of state. 

Situation: I am attending my daughters godmother wedding out of state and it falls on a weekend that I have custody of my kids (friday 9am til Monday 9am). Since this will not interfere with her custody time, can she restrict our kids from going with me?

I originally wanted to just switch weekends but she refuse to agree with that and now she says that since I'll be out of town she is going to take the kids for my weekend as well. I countered with I'll take them with me and she flipped out.
<bot>: my ex refuses to let me take our kids out of state during my custody time and there is nothing in our agreement stating I cant. Does she have any legal grounds?