You're a Physician, so I imagine you make most of the money, and while in a couple there's an element of mutual ownership of income, sometimes being recognized as the bread winner confers some unspoken, unofficial prerogatives. That said, every marriage is unique, as is each person in one. I'd wonder:
1.) Does she ever spend a hefty chunk on discretionary self-indulgence? Jewelry, plane ticket to see Mom, etc...?
2.) If she spent what you did, how would that go over with you? What's good for the goose is good for the gander & vice versa...
3.) Is this a one time blip in the family expenditure picture or is it apt to look to her like the launch of a finance (& security) draining new addiction?
4.) How is the financial health of the family? Is there plenty in the bank in case of mishap, etc...?
5.) Some Physicians work long, grueling hours & the psychological benefits of rewards (e.g.: expensive toys, dive trips, etc...) can be carrots that keep the mule pulling the plow to bring home that harvest for everyone. A happy husband counts for something, too.
6.) How much do you compromise in other areas? From your trip discussions, I get the impression you go on family vacations, dive some with your daughter, but make some allowances for other things; you don't hit a live-aboard & do nothing but dive. Plus, your family gets to go on nice tropical vacations, and I'm guessing old Dad/Hubby slaving away at the office has something to do with enabling that.
In a nutshell, don't lie, consider & honor her concerns, but at the same time, the mule could use a carrot now & then.
Richard.