AkHiker: you're right about that - once she takes the class his guns will be hers.
Jal5: you might have to change your plans somewhat, to include new guns and more ammo, and new range holsters for you and your wife, and maybe a pair of shooting gloves for her, and good lookin' shooting glasses so she can look way kewl at the range as she just holds her hand out for a fresh magazine - I don't think you'll need to convince her of much of anything after your first couple of visits to the range as she will probably start drawing up a list of new things to get for the next range trip. Yes, life can be good with the right shooting partner.........