A few nights ago, as we were putting the kids to bed:
The Wife: DD, get in here!
TW: You want to handle this one? (Points to The Boy)
TB: Why doesn’t grandma live with grandpa? Grandmas need grandpas.
(pause)
DD: Well, they used to, but it made them sad. So now they live apart.
TB: Why did it make them sad?
……………………
I have no idea how to explain that to a four-year-old.
Bless his short attention span, he somehow segued to a monologue about volcanoes.