Does your wife have complete control over your finances so that she can buy whatever she wants, whenever she wants? If I can’t get her dresses for Christmas (lol) what am I supposed to get her instead: a raccolta and some incense? 
Yes, my wife can buy what she wants, when she wants. I trust her. If you don't trust your wife, I pity you.
No one here can tell you what gift you should get your wife because you should know her better than anyone.
I know my wife would like a nice hair clip, a vacation, or a long walk in a park alone together.