I don't understand how the wife could've made the car have a weird sound just as they were pulling into the town where she was in on a trap.  I understand why she went to jail (as an accessory to a kidnapping), but I don't understand why she bothered with the phone call as there was no record of the call (unless it WAS just bad judgment getting the phone).  It was still an interesting listen to how she kept at her story, but it was her story that was her undoing in the end.