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I am sorry to hear about this situation.
1) Until/unless the court approves her modification, she does not have the right to modify the meeting spot half way.
2) If she refuses to follow the court decree as it IS NOW, then you can threaten her with contempt, which is how parties enforce divorce decrees. Contempt carries with it admonishment, fines, and imprisonment if the party is found in contempt.
3) Ergo, someone in your situation may wish to threaten her with contempt for not following orders if she plans to do this.
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