My brother is a Sneak

E-mail from my brother: Should we have a birthday cake for Mom on Thursday? (Her birthday was last Saturday)

My response: Sure, if you want to. It would be a nice surprise for her. What time are we supposed to be there? 12:00 or later?

And he's got me: Can you get it? Around 11:30.

You know, I saw it coming, but I just couldn't figure out how to duck.