Are you concerned that you wife will get in the FFR and do a full throttle burnout from the garage? From what I've seen over the years most female drivers are a lot more cautious when getting into a new vehicle and not as likely to press for the upper end of the performance envelope even after several occasions of driving it. Taking her out to show her the scary aspects of the car before she has a chance to try it out on her own will likely lead to strong criticism or your intentions.
JMHO but I'd give her the basics of how to operate the car (where the starter button is locate) and let her have at it. Ride along if she wants that, but keep your running commentary of her performance to a minimum.
Regards, Rick.