Mothers Day (?)

My friend told me it was Mothers Day today. So I asked my brother to do something for Mom today during lunch. We agreed to buy her a flower, make my little brother write her a card, and bring her out to dinner with the whole family (minus big sis) to her fav restaurant tonight.

It was all done in secrecy and occasional whispers along with some english words to prevent Mom from knowing.

Then we secretly signal Dad to come closer.

Me: "Psst.. Dad. Dont say anything, but apparently today is Mothers Day. So you come back home asap OK? We're having dinner together at Mom's fav place tonight."

Dad: "Oh OK. I thought you signaled me because you needed some extra cash."

Me: "?"

(Mom walked in the dining room)

Mom: "What are you guys talking about?"

Brother: "Oh nothing (continues eating)"

Dad: "Oh because today is Mothers Day, we're planning to go out to dinner tonight."

..

Why that little...

Oh well.