Ride in the right front one time. The view from that side is MUCH DIFFERENT than the left. My wife kept telling me I was over the white shoulder line all the time. I could tell I wasn't using my mirrors, but to her, it appeared we were. This made her nervous. I did two things to help. First, I travel a little closer to the center lane which gives her a better perspective on her side, and two I drive slower. The latter made a big difference. We travel mostly on secondary roads so it's important that the passenger feels comfortable. Remember you're only eight feet wide traveling on a twelve foot lane. You've got four feet to play with......
oh! one other thing that would cure her is to let her drive....:B:B....Dennis