You think she's her own source?
I think she made up the fact that she had a source.
Now she can't name it, because if it differs from what Novak and the other reporter say, she is up the river on a perjury charge.
There is no way a reporter for the New York Times would go to jail to protect someone in the Bush Administration, especially when his name is going to come out anyway, and he has reportedly already released them from confidentiality.