If you are already divorced (you are calling him your ex-husband), this amount should have been part of your property settlement. In any event, since you live in a community property state, the money your ex spent on you would be considered part of the community debt, for the benefit of the family. If you have already gotten divorce and there was no settlement regarding the money, it is my understanding that you do not owe your ex-husband this money and it is less likely that any lawsuit that he brings to make you pay him back for your education expenses during the marriage in a community property state of Nevada will succeed.
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