This question does not involve divorce law. Before you try to contact any type of attorney, ask yourself what evidence you have that might justify your belief that you have a good cause of action.
That is a confusing question but it sounds like, since 25 years have gone by, that there is likely no legal action available.
It doesn't sound like there is a lot of money available so if mom wishes to be buried next to son then she should talk to X and work it out. It may be possible to bury mom in same grave as son if that is her wish.
Legal Disclaimer: Paul A. Smolinski is licensed to practice law in the State of Illinois only, and as such, his answers to AVVO inquiries are based on his understanding of Illinois law only. His answers are for general information about perceived legal issues within this question only and no response to any posted inquiry should be deemed to extend any right of confidentiality between you and Mr. Smolinski, to constitute legal advice, or create an attorney/client or other contractual relationship. An attorney/client relationship is formed only by specific agreement including an evaluation of the specific legal problem and review of all the facts and documents at issue. We try to insure the accuracy of this information, but we cannot guarantee its accuracy. The reader should never assume that this information applies to his or her specific situation or constitutes legal advice. Therefore, please consult competent counsel that practices in the subject area in your jurisdiction and who is familiar with your specific facts and all of the circumstances.
This sounds like a mess to sort out and the amount of time that has passed may prove to be an obstacle. While I do not know, I wonder if the mother would have all the say regarding the son's burial location. It may be more certain and less costly to inquire into and consider the purchase of burial plots and arrange for the son's remains to be moved.
The scope of this space does not afford an opportunity to adequately advise you. The response provided is intended to be informative, but not final. You are advised to arrange a consultation at which all facts and documents can be explored and terms for representation agreed. An attorney-client relationship must be formally established.
Whenever anyone has a delayed or a denied life insurance claim, they should retain a life insurance attorney by googling "life insurance attorney" here, I did it for you... www.InsuranceClaimLawFirm.com
John Lassen 1-877-252-4630