@dyslexia,
I'm in a vaguely similar situation, Dys. Very vaguely.
OK. My father bought a four-person cemetary lot quite a number of years ago. It was, supposedly, for himself, for mom, and for me. I was an only child and have no sibs. So the fourth grave site would probably be for my spouse. Thing is, my mom died and a few years later dad died. I now own this site at the Gethsemane Cemetary in West Roxbury, Massachusetts, where my parents are buried. My wife and I live in Hawaii, about 6,000 miles from the gravesite. And we both have expressed a wish to be cremated. What is done with the ashes afterward is immaterial to me as it is, I believe, to Sglass.
I have no intention of doing anything at all about that plot of land. Let it lie fallow.