What should I say to this girl who is always jealous of me to embarrass her?

I am a person who likes to write poetry and most people like my poems very much. Some are published.

Recently I realized a girl who is jealous of people's admiration for my creativity. When someone likes my poem, she tells that it's an anonymous poem, even though she knows it's my poem. Or a poet whose name she can't remember.

Since I didn't realize she was jealous at first, I just say her it was just my poem and I didn't mind her. But if she repeats this after realizing the truth, I want to give her an answer that she will be ashamed of. What I should say to her? I don't want to be rude, but I want to make she feel that I am aware of her bad intentions.

What should I say to this girl who is always jealous of me to embarrass her?
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