There's a timeskip between the two trios of panels.
Text translation from chickenscratch:
Shannon: "Hey! Are those ALL the snacks for the kids?"
Sandra: "No, I have another box in here somewhere..."
Shannon: "Jeez Sandra!"
Shannon: "Is this an ass or a beanbag full of lard?"
SECOND ROW
Sandra: "Thanks for taking me to three drive-thrus in a row! Sorry I made a mess!"
Shannon: "Don't mention it! I thought you might."
Shannon: "Kids! Look at what happens when you eat whatever you want!"
jeering crowd: "WOAH!" "HYUGE!" "She's covered in food!" "She got too fat to get out of the car!"