Ice in the Potatoes

She laughed when we discovered
the ice cubes in the cooked potatoes,
a joyful sound that I had rarely heard
and which stuck with me for years after,
though in that moment the hard truth stuck
like a stone in our craw
as we looked at each other
over the set dinner table,
the ice cubes melting
in the hunks of steaming potatoes
and realized that my grandmother
was losing her mind.