Hello and thank you for allowing me to address your legal question.
I wish I had good news for you, but unfortunately I do not. Although a divorce judge can divide property and debts between spouses, he cannot remove a spouse’s liability to a creditor. In other words, the divorce judge can order your ex to pay the timeshare fees, and if your husband does not, you can ask the judge to find your ex in contempt, and you can even sue your ex. However, that does not relieve you of the responsibility to the timeshare company. The timeshare company can go after anybody who agreed to be liable (which you agreed to at some point), and then the burden is on you to go after your ex for ignoring the divorce decree.
I really wish I had better news for you.
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DISCLAIMER: Please understand that the complexities of most legal problems cannot be sufficiently addressed in this setting. Accordingly, my post is intended as general information only, and should neither be construed as specific legal advice, nor as an adequate substitute for the retention of legal counsel.