A loved one (Grandma) acting in a way that is "off" or non-human.
When the rain finally stopped, the garden was a different place. The “Top” herbs had sprouted new shoots, the soil was richer, and the tomatoes glistened with a fresh, dewy sheen. The family stepped outside, shoes squelching in the puddles, and shouted in unison, “Grandma, you’re wet!”—not as a tease, but as a tribute to the woman who turned a deluge into a celebration. my grandmother grandma youre wet final by top
Notable literary works that explore similar dynamics of care and elderhood include: A loved one (Grandma) acting in a way