Being a Photography Buff, I've learned:
As soon as you get your first Nikon camera, you contract an
incurable Malday. This illness requires you to purchase additional
Nikon gear, like: a new lens that covers wide angle, a new lens that covers the telephoto range, a new flash unit or maybe just a remote release cable...It does not matter what the accessory is, only that
it says "Nikon" on it and that it helps "Complete' your Photographic
Gear... Your... "System".
This Malady is known as NAS, "Nikon Acquisition Syndrome"
It is INCURABLE!
I believe that Honda has a similar affliction that infects owners of their
motorcycles...call it HAS, as in, "Honey, I just HAS to get those pipes for my Baby!"
If that doesn't work, tell her it's like her buying a new pair of shoes.
(but, be prepared to sleep on the couch for a while!)