AITAH for not wanting to sell my car

So my wife lost her job recently and we have two cars. Both are paid off and are on fine condition. I think that having two cars is good, so we can have the flexibility in case something happens with the kids we both have access to a vehicle.

Yet now she wants to go down to one car, since she not working and having two cars is a luxury. She stated her family used only one car and was fine. She then said we should sell my car and keep hers since it get better gas milages.

I told her no, my car is bigger and it works just fine. She not happy, aitah?