Well, since she played the "my buddy card" you could always tell her that you're too busy to beta, at the moment, but you could pass it along to "your friend" who loves to and has no purpose in life other than beta-ing. Say that your friend is kind of harsh, but an awesome beta and then if she gives it to you to pass along, rip it to shreds?

I mean, I don't read much Naruto fic or write it at all (though I am following the translated manga ♥) but, ignoring the spelling errors, the characterization alone from the excerpt above is enough to make me wince.

Uhm. Yeah. *goes back to lurking, now*