Thanks, guys!
I did just find another accessory... She has bar risers on her. Coming from a chopper style bike, I can't imagine leaning any more forward so I'm grateful she has them already.
I was hoping to put a passenger backrest on her but what I concluded was, "You already have the mounting hardware for a Givi Monokey trunk; why not just order a trunk and put a backrest pad on it for the wife?" So those are on order.