Do things always come in pairs?

We have known Beth to be influenced by TV advertising for some time. When she was three years old and could barely pronounce her full name she could, with perfect TV announcer intonation, declare to mommy and daddy that she really wanted “Cinderella II: Dreams come true, now available on home video and DVD.” Now she is starting to see the commercials for Spy Kids II. She already owns Toy Story II, The Little Mermaid II, and at least one other sequel that I can’t immediately recall. Her five year old mind has taken this phenomenon to the next logical step. Now we’re trying to explain to her that we don’t even know IF there will be a Lilo and Stitch II, let alone when it will be available on home video and DVD.