You'll be lucky if she accepts your answer.

But if she insists, accept it, but do NOT keep it. Rid of it when you can.

PS: Do NOT throw it away in front of her. We fear her reaction. Though we make sure our trash bins are cleared out every day and night, it would probably be unwise to discard it into one of them here, since we've gotten reports that she rummages through some of the trash cans.