I don’t think that is something to get a divorce over. If she is apologetic and will help to get it paid, and is willing to get counseling to understand the why, then what’s the problem? No one is perfect. I would gladly take a husband who the only mistake he ever made was with money but was willing to fix it. If you love her and she is your best friend, make it work. Fix the problem and just make sure it doesn’t happen again.