Here is another idea. If it does not fit you, please ignore it. If you
have that amount of money, you can help them to pay the balance off and
ask them to pay you the 25k plus 7% or 8% interest monthly.(Of course
your parents need to keep their promise.) It is like they owe you the
debt, not the credit card company.In this case, you can help them to
avoid paying 13% (high) interest, but get 7 or 8% interest yourself. At
least they are paying the 8% interest to their son or daughter, not the
credit card company.