DEAR ABBY: My sister loaned me her car when she went out of town so I could drop her at the airport and pick her up. (I don't have a car of my own, but share one with my husband.) While I was driving her car, one of the tires blew. She says I should pay for the replacement tire because I was driving the car on an errand that was unrelated to picking her up when the tire blew. I disagree. Who is right? -- JENNIFER IN FLORIDA
DEAR JENNIFER: If the agreement between you and your sister was that her car was to be used only to take her to the airport and pick her up, then you owe her a new tire. However, if her tires were so worn that they could cause an accident, then she should replace her own tire -- and the other three as well.