The truth will out

[The Son (TS) in conversation with his grandfather.]

TS: That your hoover, grandad!

Grandad: Yes, it is. Do you have a hoover in your house?

TS: Yes, Daddy use the hoover.

Grandad: What about Mummy? Does Mummy use the hoover too?

TS: No, Mummy no know how to use hoover.

Ahem.