What childish words have you heard?

I bought a bucket of popcorn home that day, and I asked her to keep it for me, saying that you can't eat it, no one can eat it, and mom will eat it after work. She said yes. She really endured not eating. Then I went into the kitchen, and her father slipped by under my arrangement and said, Dad is so hungry, give him something to eat. She is a little hesitant. Dad went on to say, dad is really hungry. She said, okay. Dad ate a lot and said, don't tell mom. She said yes. Then dad went into the kitchen, and I went out to get popcorn, pretending to be surprised. "Is this popcorn eaten by anyone?" She said no. I said, but there is less popcorn. She was silent. I said, "Did Dad eat?" She said, "No, it's me." I really didn't know how to pick her up at that moment. My first reaction is that I am disgusted with myself who wants to test the child's nature for entertainment. Her behavior was completely out of my expectation. "Should I expose her for lying?" I thought about it, but I still couldn't say it. Because if she is wrong to lie, then I am the most wrong person. For my own happiness, I tried to test a child's humanity. And her answer left me speechless.