OOH OOH OOH! MEMEMEME!
I've been there and done that. Beestie is partly right, IF that's her case. Definitely talk it out, frankly and in "safe space", which is a designated spot (can be in home or out) where anything can be said without fear of rejection or embarassment. side note: I wish I had remembered that this time last year
If this is something she cannot live without and YOU cannot get into, your relationship is doomed. If it's just a "spice" that she can set aside except for once a year, then you can "suck it up" and play her game that one time. Or else you can agree that she can go outside your sphere to get that one thing but cannot bring it back in and follows other basic guidelines that you agree on in advance.
If not, send her my way, I'm available and kinky as they come!
Brian