Tell her that you can’t have her doing this anymore. There are a variety of issues with it but for the sake of your friendship you won’t go into the “why” …she just needs to not count in you for this in future.
If she is still friends with you then she is your friend. Be prepared for her not to be though.
Never discuss it again and never tell her why.
BTW the “why” is you never should have let her do it the first time so it’s on you.
Here’s what he is doing.