They say that the average age difference between siblings is 2-3 years. And wouldn't you know it — now that Claire is 28 months old, many of my mommy friends whose first children are around her age have steadily been giving birth to their seconds in these past few months. I'm happy for my friends and their families — I truly am! (I can also say that I'm sooo glad to be out of those extremely trying newborn-with-a-toddler months!) But there is one thing that makes me a bit sad, and even a tad bit jealous whenever I hear/read about their new babies...