Tooth fairies can forget what they're supposed to do. The last thing this tooth fairy remembers before falling asleep was that she was supposed to tell the tooth fairy's husband not to forget to leave the tooth out. She couldn't say much more since the little head that lost the tooth was lying next to hers in bed. But the next thing she knew, it was early morning and she was, as usual, face-deep in her computer, when she heard a small, tearful voice say, "Mommy, the tooth fairy didn't come."