after you buy her that rifle you can go ahead and get her that new chainsaw she's been wanting.

Yes, permission is WAY harder than forgiveness.

I am only a 1.5 year married pup myself, but being just nice seems to work. Convincing them of the investment value isn't a bad idea and MIGHT have some pull. Especially since you enjoy it, she's probably not going to blow a fuse if you can show her that most of the $$$ you spend on guns is just as good as puting that money in a savings account.