OK my wife is getting on the interstate and she is behind a dump truck trying to merge over when a rock flys off the back and breaks her windshield...this is the second time this has happened to her and I am getting pretty tired of paying for windows...Unfortunately she did not get the drivers tag (typical) what is the law/ rule on this...will I have to pay it if it is less than my deductable or is there a chance an insurance company will cover it ...I have USAA