My funny story

First you are writing on the walls,
Then you are writing a book..
I was painting a wash room in the park at night once.
Because some one wrote something stupid and mention the same name like my mom..
Some one else told her, a friend.
It was nothing, same name and a comment, funny..
No Internet at that time.
I was asking her, how do you know it's you,
She was painting the entire wall so no one would notice:
The same name, who do you think people will think.