It is impossible to say without seeing all the documents involved, including the divorce decree. Contact a family law attorney, or the one that handled your divorce.
I read your question three times and I am sorry to tell you that I do not understand it; who wants to cash out and what is the correlation of the overpayment to the condition of the loans; if the respondent paid in full and you paid 1/2 would the timeshare allow the respondent to cash out. One thing I know; no one can force you to give credit to Respondent unless you want the title of the timeshare for yourself alone and to assume the rest of the loan; that would not be forcing you to give credit but a negotiation for you to assume the rest of the loan.
This response will not create an attorney-client relationship between you and Sarieh Law Offices, and is not intended to serve as a legal advice in your specific circumstances. This response is a legal opinion based solely on facts represented and you should not rely on this legal opinion as a legal advice. You still need to consult an attorney directly to fully protect your legal rights.
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