Why.. why would anyone buy anything on other's behalf, and especially got it so wrong?? Does she know you at all, or is it her blunder that she tries to get others to compensate that? I say don't pay her, and don't take it, be firm about it, you will be blameless and it will spare you similar problems in the future. (of course she would blame you but it's very hard to be spotless with these kind of people, they will blame you for other things anyway)
If a year ago someone told me we have pandemic, and the biggest enemy is people who refuse to believe and take precautions, I would say human are smarter than that.
But now I have lost all my expectation, and I am the idiot for thinking that.