I want one bank account for my wife and I
Why do you want to have one bank account?
You know, when two people do things together for a long time, they end up having the same things to share as well.
If your wife is fine with one shared account, then that is fine. Sometimes people prefer to have two accounts, so that everyone knows whose money is whose.
I am not sure what option she wants.
Then it is a good time to ask her opinion. You need to come to this decision together, because it is an important one.