I love that it's a moment between two sisters, when neither of them realized they were being observed. Em is a doting, helpful older sister, while Mimi is the most adoring little sibling who welcomes any encounter with her idol.
It's not easy to hear, but I love how Em assures Mimi that she's got her, that she's ok. Mimi falls, and Em is right there to help her get back on her feet. And Em can't help but to give her snuggles.
These are the type of moments I never want to end. I know they can't be so perfect to one another forever, but times like this I wish I could pause and truly soak up.