Salesman and the kid

“Is your mother at home?” the salesman asked a small boy sitting on the front step of a house.

“Yes, she’s at home,” the boy answered, moving over to let him pass.

The salesman rang the doorbell, got no answer, knocked once, then again. Still no one came to the door.

Turning to the boy, the salesman said, “I thought you said your mother was at home.”

The boy replied, “She is, but I don’t live here.”