More on Naughty Words

Apani, "I know a naughty word the starts with O"
Me, "There aren't any."
Apani, "Yes, do you want me to tell you what it is?"
Me, "OK"
Apani, "Will I get in trouble?"
Me, "No, you have my permission." After all there is no naughty word that begins with O ... right?
Softly, she replies, "Oh sh*t"
Me, "Yes, you're right, there is a naughty word that starts with O. Let's not say that word."