Fast wearing brakes

To my understanding this is for the fronts only, thus the cost. And like I said, it dosnt add up to me either. She is about 50 miles from me, so scheduling any thing other than time together and with the kids can be hectic. The brand name I dont know for sure. I will try to find out and get back to you. Someone else suggested to me that this car should be using ceramic pads, whether it is or not I dont know, like I said I will try to find out. She is only about 3 weeks from planning to have them done again, so I will just have to try to schedule it where either I can do them or be there when they are done. Another thought, could a proportioning valve problem cause this? Thus the fronts being eat up like they are because of the backs not working correctly? By the way, I think it is a 4 wheel disc setup. Thanks for any help or info.