This happened to a friend of ours. She left all the finances and bill-paying to her spouse, and found out too late that he had cashed in retirement accounts, drained their savings, and re-borrowed on the mortgage.  Divorce, and nothing left after the sale of the family home.

She wasn't even supported by her spouse, and had a good career and income. She just could not be bothered to attend to her personal, and family, finances.