My goodness, quite a bit of misogyny going on in here - "Buy her a purse" "get a spa treatment" "buy some Jimmy Choos" "Lie to her about the price".
My wife doesn't *love* pinball like I do but she *loves* me and because of that, she fully supports my hobby and makes it possible for me to pursue it, by coming to shows or carving out time so I can go to the garage to tinker on a project game.
In exchange, I support her hobbies, because I *love* her too. That's why I said that your best scenario is her supporting you. If you've got that, you're golden.