[BigAls87Z28]

If they warranty the tires, that's a gift.
Get the tires replaced and have the alignment checked. If the front end checks out and the tires balance out without adding two pounds of meta to each wheel, then you are in good shape.

I'd probably guess that the camber/toe is so shot out from driving over these roads that she's been wearing them out prematurely. I'd also guess that she drives a bit aggressively considering the type of car and people's general lack of giving a **** about driving.