You know, if it's that same writer of bad HP slash that I'm thinking it is, it really doesn't surprise me that she's been accused of plagiarism. After all, that's what all of her wank was about back when she wrote fanfics. I guess her "borrowing" finally caught up to her. Poetic justice if you ask me.

Edited because I can't spell today. Errrr.

Added: Doesn't look like they're the same person, unless Cassie Clare suddenly aged about 20 or 30 years. It's the same type of plagiarism, though.