Sing Liz, sing. When travelling long distances with someone with whom I have little in common, I put on my own compiled tapes or Cds and sing. I explain at the outset that this is something I must do to keep my wits about me and to counteract the fatigue of long distance driving.

Who knows, there might be one or two songs, that will peak your sister's interest, that could compel her to join in. It is amazing how many miles you can go and not say a damned word to another person.

As for the rest of the time, I'm afraid you're on your own.