why would my car wear the inside rear tires out in about 100 miles.

Thank you for responding but what she is trying to explain is She drove the car to paducah and the next morning we got in it to have breakfast and when I would make a left hand turn from a stop I could hear the left rear tire scrubbing like I was trying to scwall the tires. I thought it never done that before and would check it out when we got back home on the weekend. That night it was raining and we went on I-24 to grab supper and it was all I could do to keep it on the road at 50 mph. It felt like you were on ice. When we got home the next day I could see the rear of the car was setting to low and the caster on the rear tires was off (top of tires leaning in) it had worn the inside 1 1/2 inch of the tires down to the cords.What could have gone wrong so quick?