Negotiating Dinner with Katey

We are eating Kraft Macaroni and Cheese for dinner, with peas and ham. Katey decides she would like more ham. I tell her she needs to eat her mac n cheese and peas. She gets through the peas, and asks again. So I tell her, okay, you eat a forkful of mac and cheese and I'll give you a piece of ham. Here is her forkful of mac and cheese and the look I got from her: