If my wife has awful credit, cannot qualify for a loan, she is listed as a co-applicant, what can I do to remove my financial liability from the debt?

My wife and I are about to be officially divorced. Final papers are signed and are being processed. It is an uncontested divorce, and a settlement agreement is signed in which she agreed to pay me $15,000 towards our credit card debt. However, she has awful credit, cannot qualify for a loan, and refuses to ask her family for financial help. The credit debt exists on my credit card, and she is listed as a co-applicant.