I'm surprised that he hasnt gone to court to ask for court's permission to take them if Nicole is not allowing it.
In my job i hear of it all the time and i know people that have done it aswell. there has to be a good reason for the parent refusing permission where there is parental responsibility for the other parent
I'm thinking that if Chris hasnt, he likely knows that there is a poor chance of success. obviously we dont know the full circumstances but if he thought there was a good prospect of success he would make the application to the court given that it isnt that expensive for that type of application. he probably thinks the court will turn him down.
I'm not saying anybody is right, either Chris or Nicole, but slating Nicole online wont help his cause though.