Sorry to hear about the wife's crash and injury.Perhaps help her find another activity.Hiking -bird watching comes to mind.I wouldn't even bring up the bike.If in a year or so she decides to hop on again then it was her decision.If riding starts again take the lead and slow it down.I know I speed it up at times and almost crash,saying to myself WOW that was close.Whats even worse I do it on the same trail into the same curve all the time.