Rob, my wife doesn't like to ride on my GSA, and when it comes to the kids - no way, but everyone wants to ride in the side hack.
I was reading some stats somewhere, I can probably get my hands on them again if I really want to, and they showed accident mortality and morbidity for sidecar drivers /100000 km to be basically the same as driving in a car. Riding a standard motorbike is 3-10x higher than for a car. Those #'s are from memory but are going to be pretty close.
If she's stressed about safety, sidecar rides are a totally different game than riding a bike.
the other Rob