OCD much?

Conversation with my sister about her lack of Internet:

Sister: It's a problem because I like to check things. I am an obsessive checker.
Me: You know there's a disorder to describe this.
Sister: What disorder?
Me: OCD.
Sister: No! It's not crazy checking.
Me: Do you even know what OCD stands for?
Sister: Obsessive Checking Disease?
Me: No...but close.