my wife thought her car had a heater button but it was the rear defrost

My wife and I work together and sometimes commute to the office together in the morning. It was pretty chilly this morning in central Virginia but somehow no frost on the windows.

So we got into the car and started blasting some heat when i noticed that she had the rear defrost button turned on. I proceeded to turn it off because it wasn't necessary. She was like, "why'd you turn off the heat"? I said, "you mean the rear defrost"? She proceeded to make fun of me for not knowing that the button was the heater button and texted our parents to tell them how silly I was.

I was laughing on the inside so hard because I knew she was wrong and I was right. I made her get out the manual and we confirmed that I was right. Somehow she is still holding out that she is right though....women haha