Wait, that's not what I meant...

Elder Son emerged from his room horrified to find he and I were wearing similar brown t-shirts.

He:  Oh, great.  We're dressed alike.
Me:  Don't worry.  I'll be taking off my shirt for work.
He:  ...
Me:  I mean, I'll be changing my shirt before I go to work.
He:  Either way, you'll wait until I leave first, right?