In the 2003 film Secondhand Lions, teenager Walter lives with his uncles Hub and Garth. During the summer he gets a pet lion, who later
has a heart attack while protecting Walter from his mother's abusive boyfriend Stan.
Attempting to make Walter feel better, the uncles state the following:
Hub: She died with her boots on, that's the main thing.
Garth: (pointing at Walter) Protecting her cub.
At the time, however, they were in the house and supposedly asleep. Walter's mother was watching for them, and the three ran out of the house after hearing Stan's screams.
How did Hub and Garth know the circumstances of the death, or even who Stan was?