Satan?

We read The Big Picture Story Book Bible to our boys each night. It begins in Genesis, describing the Garden of Eden where a snake represents Satan. Tonight we took the boys to get haircuts. The lady that cut their hair told A that her son had a snake and it lived with her right now since her son has now left home (for school or something). This was the conversation in the car after leaving the salon.

A: "Dad, what was her name?"

Dad: "Well, I don't know. Maybe it
was Judy."

A: "No, maybe it was Satan."

I think it had something to do with her having a snake.