As a tax accountant, I can testify that a majority of households have one person in charge of preparing taxes and attending their tax meeting. Your financial life shows up in your tax return. Do not abdicate your responsibility for taxes. Even if only one of you can attend your tax meeting due to scheduling conflicts, at least review your tax documents and your final return together. If you do that, at least some of the above deceits won't happen to you.
Much is written about the value of a weekly date night. Take note though, the date night is not the night you want to be talking about money issues (what a kill joy). Maybe assign the 3rd week of every month to discussing financial issues, household priorities, child rearing and to take a few moments to talk about where you see yourselves as a family 2 - 5 years down the road and what steps you can take today to get there.