Instead of "OK", we got a "Yes"

Just arrived off the Amtrak train to visit my family in Maryland and got into my cousin's car with my aunt and cousin.

 Once we arrived at her house, my aunt turned to Carolina and said, "Did you have a good time on the train?" Clear as day, and without hesitation Carolina said, "Yes!"

I was stunned. She didn't say "Okay" or just smile, like usual. Or even "Yeah"; she said, "Yes."

Awesome.