Is there a seperation agreement or judgment of divorce? What do they say about education?
I am a former federal and State prosecutor and now handle criminal defense and personal injury/civil rights cases. Feel free to check out my web site and contact me at (212) 577-9797 or via email at Eric@RothsteinLawNY.com. I was named to the Super Lawyers list as one of the top attorneys in New York for 2012. No more than 5 percent of the lawyers in the state are selected by Super Lawyers. The above answer is for informational purposes only and not meant as legal advice.
Consult the judgment/custody order/separation agreement re: your consent for the private school. If she claims that she is waiving any obligation for you to pay for the private school, get that in writing from her as a defense if she ever seeks to enforce such a provision. You would also have the defense of no consent for the additional expense if it was needed prior to enrolling her.