What do I owe my ex # 3?

I hit a decent lottery number last week and now my nut-job ex# 3 is hounding me for money again. Back when we were married and fighting each and every dang day I wanted a divorce but she wouldn't give me one cause she thought I hadn't suffered enough. I finally drove her Camero into the river just to show the skank I meant business and she finally signed. What she didn't realize was the insurance wouldn't pay for the car because I did it on purpose and she has been haunting me for years for the money. I vowed I would flush it down the toilet before she got another cent from me. Am I right or not?