Lois: I have had it!
Malcolm: What are you doing?
Lois: I am taking everything! Every present, every decoration, every treat. I am locking it in the garage. Every single Christmas, you three burn or break or destroy, and I am putting a stop to it!
Dewey: She's stealing Christmas!
Malcolm: Mom, you can't do this!
Reese: Yeah, this is the last year Dewey will believe in Santa Claus.
Dewey: What?!
Lois: If you boys behave until Christmas morning, there will be a Christmas morning. Otherwise, these are going back to the store and Christmas will be cancelled!
Reese: You wouldn't cancel Christmas. You're bluffing.
[cut to Reese sobbing as he watches his stocking burn in the fireplace]