I must say that my wife is very financially literate :) Not only she has an MBA degree she is also very interested in everything financial, when she had a mortgage she knew exactly what the rate on it was.
As far as the dog, yeah don't give in :) And the dog is very likely to become yours. We tried getting a Greyhound and that didn't work very well it was supposed to be our daughter's dog, but it became my dog and the whole experience was not good...
One of the couples I know are both ex-stock floor traders, she is still on the ball. But, those like her and your wife tend to be outliers still.
This reminds of something my Father-in-law said to someone who was walking our dog years ago when asked by a passerby, "what kind of dog is it?"
"A Daughter's Dog"