On David's ""last waiting day,"" Daddy makes breakfast, Grandma comes to help with the wash, David does some grocery shopping, and the day goes on. . . until (unaccountably, it's after bedtime) Grandma says ""here they are at last"" and there is Mommy with a new sister for David. ""Good night, Daisy,"" he whispers to the baby, now settled in a cradle. ""I was waiting for you a long time."" Bland and uneventful, this is no doubt the way parents would like to see it happen, but it won't do much for other Davids, whatever their view of the occasion.