Mean?

We were picking up hot dogs and chips at a local open house. I sat the boys down at a community table where an older couple was already sitting.

Me to L1: You need to eat at least half of your hot dog before you have chips.
L1: Mommy, are you going to be mean?
Me (confused): Am I going to be mean?
L1: Yes, are you going to be mean?
Me: No, I’m going to be firm.
L1: Okay
Me: Am I usually mean?
L1 with a big smile and a giggle: No…