I've got three...Will anyone give me four?

I was a little late getting dinner started this evening so I let Madison have some pumpkin bread on a plate. I was thinking one piece but she took two. That's fine. I didn't feel like arguing with her while I was trying to get dinner on. Then she came back for more. I gave her a slice from a smaller loaf. She fussed so I put two on there. No, she wanted one from the bigger loaf. I removed one of the small ones and put on a larger slice. "I want three," she says, so I add the small slice back on. "I want four," she says. At this, I just start cracking up. She is very persistent when she wants something, but this is the first I've actually seen her start haggling with me!