Hi, thank you for your question. Just a bit more information required to fully assist you:
-Are you in England or Wales?
-Has she remarried?
Thank you for your question
My name is ***** ***** I have been a Family lawyer for more than 30 years
technically if she has never remarried then it would be possible to reopen the 1984 Divorce and make a financial claim on it.
However there is a great deal of "bluff" involved as the fact that there were no assets at the time of the divorce and all the assets actually relate to a subsequent cohabitation
means that the Court is not likely to actually entertain the application and act upon it.
Please ask if you need further details