I like this one too!!! I love the happy expressions they both have, and the body positioning is excellent. The background is nice too, and their position on the edge of shaded and more-open light is nifty. The blooming purple bush in the background draws the eye to your little one's foot...which quickly gives the eye a nice scene depth cue, and her legs are almost in a walking position, even though her auntie has her spinning around four feet off the ground!!! So cool. I also like the subtle color harmonies...your sister's shoe soles kind of match her blouse color, which also matches your baby girls's blouse and headband color. I mention your sister's shoe coloration also because it draws attention to a very,very critical thing in photos of people in movement, called "heel lift". Her foot position is a really fundamental visual cue that indicates she is moving...not just flipping her hair or something. The heel lift, plus the hair, and the baby's angle, all seen presented in a very,very subtle silhouette against that manicured, expansive lawn and big, beautiful tree...just filled with win-win-win-win.