I have a friend who is divorced in PA. At the time of the divorce, they agreed to carry health insurance on both children (written in the divorce agreement.) My friend is the primary, and his ex is the secondary. Their daughter was just hospitalized, and my friend found out his ex no longer carries insurance on the children. He was socked with a three thousand dollar bill from the hospital that his insurance did not pay. Normally, his ex's secondary insurance would have pick that up, however, since she no longer carries insurance on the children, who is responsible for paying that bill? Would it be her, or would they split it 50/50?