That’s a big problem. I agree with @jym626 that you have to appeal to your mom to stop. It might be too late to withdraw (different schools have different deadlines), but you could investigate that option. It’s not always easy to arrange an incomplete if the student hasn’t done the work in the first place (and in that case, the student still has to do the work).
However – let’s say your daughter fails all of her classes this semester. It’s true that this will tank her college GPA. However, it might be possible to start fresh (some years down the line) at a different university. Even if these courses end up on the transcript as transfer (failed) courses, some schools will allow students to retake the courses for replacement grades. That’s a decision that lies in the future, but it’s something to consider.