My Grandmother's Masterpiece

'This is the story of how my grandmother became a famous artist. It happened somewhere between my seventh and eighth birthdays, so she was really old and also a grandmother, and I didn't know she was an artist. And, of course, she was not famous. And then she was both, all at once.'
For Nini, Minima is just her normal everyday grandmother. So when Minima suddenly shows an interest in doing something new, Nini is not sure that she likes it. After all, a grandmother's first job is being a grandmother, isn't it?