(This is an ageplay story.) (Also features Aricka Winchester, my fave OC.) It was originally just a hypothesis. Aricka had worked with Littles before, and she knew their quirks and behaviours. So when she saw her brother, Dean, displaying a few traits of being Little, she approached Sam to ask for help in testing out her theory. Lo and behold, after a few talks with Dean, they have a very cute Little on their hands.