My youngest son has to have surgery and the copay is $200. My soon to be exwife wants me to pay half of the copay. She makes almost three times the amount I make in salary and already has a court ordered child support payment. My question is this: Do I have to pay half? I told her that I would pay a portion of the bill that is equal to our salaries, since she makes so much more than I, it isn’t right for me to have to pay half.