Cremation Talk

I'm minding my own business up at the courthouse this morning and got sucked into a conversation.  One fine employee was talking about how her parents wanted to be cremated. However, I knew for a fact that those parents are over-planners and have already purchased burial plots at a local cemetery. They've even gone so far as to have had their names engraved on the headstone. (That's some serious planning.) So I asked this fine employee why they wanted to be cremated when they already had plots. Her answer: They planned on burying the ashes in the plot.

I said that's crazy. She said I was crazy and that it "happens all the time."

Discuss amongst yourselves. Show your work.