Great read in this thread!
My wife gave up her one hobby (belly dancing), which didn't have a huge expense involved with it - weekly lessons, and outfits, of course. I've been trying to get her to take it up again (it also gives me quiet time for recording once a week!)
When I bought my 310ce she used the expense as a 'dig' for weeks and weeks, couldn't understand why I would get a guitar that cost so much, etc. She did admit at one point, though, that it sounded much better than my other acoustics.
I remember the first time I pulled out my 72 Tele several years ago - I've had it since it was new - and she started questioning where I had got it, how much I spent, etc.
A few of my guitars have just been added to the collection without her knowledge. "I've had that for
years ..."