Misunderstanding

I was talking to my mom on the phone, which included me saying, "Karen won't be having lunch with us on Sunday." When I hung up, I realized my baby girl was sobbing hysterically. 

"What's wrong, Kare-bear?"

"I want to eat dinner!"

"We're going home for lunch right now."

"On Sunday."

"Oh. I was saying Bibi won't eat lunch with Grammy on Sunday. You'll eat with us."

"Oh. Ok." It took another minute for the tears to stop, though.