I agree with cleanmachine, talk to the courts about this. Also depending on the judge (if you see a judge in this case). She could be liable (depending on the law) for paying him back money from the time of death. Or the husband might have to just pay what he owes or get a % cut off the balance.
Sorry for your lost.
My step dad was paying for my step-brother (she waited until he was 16 to file for support), come to find out that he was not going to school and the mother had to pay my dad back a few hundred. That was part of the agreement as long has he stayed in school (I.E. high school and college) he would continue paying. HE only finish high school and 6 months of college.
~