That's me. 2 vacations/year plus our 1 car is new. My bike is nice and so is hers. she doesn't bike to work but telecommutes about 3days/week. That means that our car goes to work 2X per week. Gas, insurance, maintence (i do routine maintence myself) is all inexpensive. We sold our last car before any major service was due.

My wife and I have always been 1 car, so our discussions are a bit different than the OP's. It's more like "Honey, why don't you just get a car?" and I say "I could, but I don't want a car!". I keep stressing that the commute and errands on my bike are pretty much my only exercise, and I need that. If I were to get a 2nd car it would ABSOLUTELY be a waste of money. Either I'd pay for the car and insurance and drive it 4 times a year (total waste of money), or I'd drive it when I really should be riding my bike, wasting money and growing my waistline (wasteline?). at this point in our lives, a 2nd car makes no sense.

Your situation is a bit different though, with a 32mile one-way commute. Mine is only 10miles and I can telecommute if I want to (so can she). But I used to have a job where the commute was 18-20miles one way, and I'd ride that commute 4x per week using transit the 5th (this was before i got the telecommute option job).

If you tried to carpool to your wife's work then ride from there to your work for a while maybe you could leave the 2nd car parked. If you didn't want to ride the bike you could drop her off and take the car to your work. Once you start trying the alternatives you'll see if they work. If they work it'll be pretty clear that the 2nd car is not necessary. It'd be very easy if your home was closer to your work, is moving an option?